Answer : 3. "ONGC"
Explanation :

ONGC has started oil production from its flagship deepwater project in the Krishna Godavari basin in the Bay of Bengal. Petroleum and Natural Gas Minister Hardeep Singh Puri said that 45 thousand barrels of oil per day and more than 10 million standard cubic meters of gas per day are expected to be produced. This project is expected to increase the current national oil production by 7 percent and national natural gas production by 7 percent.