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The correct answer is Organization of Petroleum Exporting Countries.
The Organization of the Petroleum Exporting Countries is a permanent, inter-governmental organisation, created at the Baghdad Conference in 1960, by Iran, Iraq, Kuwait, Saudi Arabia and Venezuela. During the first five years of its existence OPEC had its headquarters in Geneva, Switzerland. Later this was moved to Vienna, Austria, on September 1, 1965. The OPEC Conference of Ministers meets in ordinary session twice a year, and is responsible for the formulation of the general policy of the organisation.

Correct!
The Organization of the Petroleum Exporting Countries is a permanent, intergovernmental organisation, created at the Baghdad Conference in 1960, by Iran, Iraq, Kuwait, Saudi Arabia and Venezuela. During the first five years of its existence OPEC had its headquarters in Geneva, Switzerland. Later this was moved to Vienna, Austria, on September 1, 1965. The OPEC Conference of Ministers meets in ordinary session twice a year, and is responsible for the formulation of the general policy of the organisation.

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The correct answer is 11.
OPEC consists of eleven oil-producing and exporting countries, from Africa, Asia, the Middle East, and Latin America. The current members are Iran, Iraq, Kuwait, Saudi Arabia, Venezuela, Algeria (1969), Indonesia (1962), Libya (1962), Nigeria (1971), Qatar (1961) and the United Arab Emirates (1967). Of these the first five are the founding members of OPEC, who came together to form the organisation in 1960. OPEC's eleven members collectively supply about 41 per cent of the world's oil output, and possess more than three-quarters of the world's total proven crude oil reserves. Membership is open to any country which is a substantial net exporter of oil and which shares the ideals of the organisation.

Correct!
OPEC consists of eleven oil-producing and exporting countries, from Africa, Asia, the Middle East, and Latin America. The current members are Iran, Iraq, Kuwait, Saudi Arabia, Venezuela, Algeria (1969), Indonesia (1962), Libya (1962), Nigeria (1971), Qatar (1961) and the United Arab Emirates (1967). Of these the first five are the founding members of OPEC, who came together to form the organisation in 1960. OPEC's eleven members collectively supply about 41 per cent of the world's oil output, and possess more than three-quarters of the world's total proven crude oil reserves. Membership is open to any country which is a substantial net exporter of oil and which shares the ideals of the organisation.

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The correct answer is Saudi Arabia.
At the end of 2001 world proven crude oil reserves stood at 1,074,850 million barrels, of which 845,421 million barrels, or 78.7 per cent, was in OPEC Member Countries. According to OPEC's annual statistical bulletin 2002, the countries that produced the most oil include Saudi Arabia (7.889 million barrels per day), Russia (6.730), United States (5.801), Iran (3.572) and China (3.297). According to the OPEC Annual Statistical Bulletin 2001, the world's largest proven crude oil reserves are in Saudi Arabia (262,697 million barrels), Iraq (112,500), Iran (99,080), United Arab Emirates (97,800) and Kuwait (96,500). 

Correct!
At the end of 2001 world proven crude oil reserves stood at 1,074,850 million barrels, of which 845,421 million barrels, or 78.7 per cent, was in OPEC Member Countries. According to OPEC's annual statistical bulletin 2002, the countries that produced the most oil include Saudi Arabia (7.889 million barrels per day), Russia (6.730), United States (5.801), Iran (3.572) and China (3.297). According to the OPEC Annual Statistical Bulletin 2001, the world's largest proven crude oil reserves are in Saudi Arabia (262,697 million barrels), Iraq (112,500), Iran (99,080), United Arab Emirates (97,800) and Kuwait (96,500).

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The correct answer is Seven biggest oil companies.
Following the break up of Standard Oil, the oil refining company founded by John D Rockefeller and his partners, in 1911, several new companies were created, three of which, along with four other major oil companies, were once referred to as the Seven Sisters. The original Seven Sisters were Exxon (or Esso, Humble, Standard of New Jersey), Shell, BP (British Petroleum, originally Burmah Oil + Anglo-Iranian), Gulf, Texaco, Mobil (Standard of New York), and Chevron (Standard of California). Since Gulf Oil no longer exists (acquired by Chevron in 1984), Amoco (Standard of Indiana) was often added to the list of six; but in 1998, Amoco was acquired by BP to form BP Amoco. Exxon acquired Mobil; and Chevron and Texaco merged in 2001-2002. BP Amoco, ExxonMobil, and ChevronTexaco, combine within them no fewer than 14 of the 35 Standard Oil Trust companies that were divested from Standard in 1911.

Correct!
Following the break up of Standard Oil, the oil refining company founded by John D Rockefeller and his partners, in 1911, several new companies were created, three of which, along with four other major oil companies, were once referred to as the Seven Sisters. The original Seven Sisters were Exxon (or Esso, Humble, Standard of New Jersey), Shell, BP (British Petroleum, originally Burmah Oil + Anglo-Iranian), Gulf, Texaco, Mobil (Standard of New York), and Chevron (Standard of California). Since Gulf Oil no longer exists (acquired by Chevron in 1984), Amoco (Standard of Indiana) was often added to the list of six; but in 1998, Amoco was acquired by BP to form BP Amoco. Exxon acquired Mobil; and Chevron and Texaco merged in 2001-2002. BP Amoco, ExxonMobil, and ChevronTexaco, combine within them no fewer than 14 of the 35 Standard Oil Trust companies that were divested from Standard in 1911.

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The correct answer is to deliver steady supplies of oil to consumers.
OPEC Statute, which dates from the earliest days of the organisation: "OPEC's principal aims are the coordination and unification of the petroleum policies of Member Countries and the determination of the best means for safeguarding their interest, individually and collectively. The Organization shall devise ways and means of ensuring the stabilization of prices in international oil markets, with a view of eliminating harmful and unnecessary fluctuations." OPEC does not control the oil market as it produces about 41 per cent of the world's crude oil and 15 per cent of its natural gas.

Correct!
The OPEC Statute, which dates from the earliest days of the organisation: "OPEC's principal aims are the coordination and unification of the petroleum policies of Member Countries and the determination of the best means for safeguarding their interest, individually and collectively. The Organization shall devise ways and means of ensuring the stabilization of prices in international oil markets, with a view of eliminating harmful and unnecessary fluctuations." OPEC does not control the oil market as it produces about 41 per cent of the world's crude oil and 15 per cent of its natural gas.