The correct option is D Organization of the Petroleum Exporting Countries
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The primary work of RBI is to supervise the issuance of banknotes and the maintenance of reserves to ensure the stability of India’s currency and full operation of the country’s currency and credit system. However, the IMF ensures that trade flows smoothly between countries, OPEC coordinates with the petroleum policies of oil-producing nations and ensures regular supply of oil at right prices, and the WTO aims to remove obstacles that influence global trade.