New Delhi UK's BP plc has relinquished or surrendered 9 out of the 21 oil and gas blocks where it had bought 30 per cent stake from Reliance Industries for USD 7.2 billion, due to poor hydrocarbon prospects.

BP had last year bought 30 per cent stake in a total of 23 oil and gas blocks of RIL including the gas discovery areas of KG-D6 and NEC-25. The Cabinet had however approved of BP taking stake in 21.