Q. Which of the following oilfields are located in Assam?

1. Digboi
2. Naharkatiya
3. Moran
4. Ankleshwar

Select the correct option from the codes given below:
Answer: 1, 2, and 3 only
Notes: Digboi, Naharkatiya, and Moran are major oilfields located in Upper Assam and have historically contributed to India’s petroleum output. Ankleshwar is in Gujarat and not part of Assam's oil sector. Therefore, only the first three oilfields are correctly associated with Assam.