India, with a score* of 7.21 on the corruption index, is the fourth most corrupt nation in Asia, according to a survey by the Political and Economic Risk Consultancy (PERC).

Companies have cited excessive regulation and high levels of corruption as a major constraint to doing business in India. Corruption takes the form of bribery, kickbacks from deals and tax evasion in India. It continues to be a major concern, especially in government procurement of telecommunications, power, and defence deals, the study states.

So which are Asia's most corrupt countries? Click here to find out. . .

* (Note: On a scale of zero to 10, zero is the best possible score.)

Image: An Indian hairdresser ) designs a new hairstyle for his client in Mumbai. India's arms bribery scandal, exposed by 'Tehelka', was the inspiration for this wacky hairdo. | Photograph: Reuters.

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