India's Oil and Natural Gas Corporation has beaten Chinese rival, CNOOC, to become Asia's top oil and gas exploration and production company. It climbed three places to take the top slot in the 2010 rankings released by Platts, one of the most respected global provider of energy and metals information.China National Offshore Oil Corporation, CNOOC, this year slipped to No.2 slot. With revenues of 22 billion dollars, ONGC reported a profit of 4.2 billion in the 2009-10 fiscal, which forms the basis for the Platts rankings. Platts also ranked ONGC as the fastest growth company in Asia in the Exploration and Production sector.