Solution:As per the question period, Oil India Limited (OIL) was a Navratna CPSE under the administrative control of India's Ministry of Petroleum and Natural Gas but in 2023, it is upgraded to Maharatna status. At present (As on 30 April, 2024) there are 13 Maharatna, 20 Navratna and 65 Miniratna (54 in Category-1 and 11 in Category-II) Central Public Sec- tor Enterprises (CPSEs) in India.List of Maharatna CPSEs (As on 30 April, 2024):
1. Bharat Heavy Electricals Limited (BHEL)
2. GAIL (India) Limited
3. Coal India Limited (CIL)
4. Indian Oil Corporation Limited (IOCL)
5. NTPC Limited
6 Steel Authority of India Limited (SAIL)
7. Oil and Natural Gas Corporation Limited (ONGC)
8. Bharat Petroleum Corporation Limited (BPCL)
9 . Hindustan Petroleum Corporation Limited (HPCL)
10. Power Grid Corporation of India Limited (PGCIL)
11. Power Finance Corporation Limited (PFCL)
12. Rural Electrification Corporation Limited (REC Ltd.)
13. Oil India Limited (OIL)
Note: REC Ltd. gets Maharatna Company status in September, 2022 while Oil India Ltd. gets this status in August, 2023.