The correct answer is C. Barauni.
Barauni Refinery is the largest refinery in Bihar and the second largest refinery in India. It is located in Barauni, Bihar, India. The refinery was commissioned in 1964 and has a capacity of 6.0 million tonnes per annum (MMTPA). The refinery is owned and operated by Indian Oil Corporation Limited (IOCL).
Barauni Refinery produces a variety of products, including gasoline, diesel, kerosene, LPG, naphtha, and bitumen. The refinery also produces a number of specialty products, including polypropylene, paraxylene, and benzene.
Barauni Refinery is a major source of employment in Bihar. The refinery employs over 10,000 people directly and indirectly. The refinery also contributes significantly to the state’s economy.
The other options are incorrect.
- Singhbhum is a district in Jharkhand, India. There is no oil refinery in Singhbhum.
- Rudrasagar is a town in Bihar, India. There is no oil refinery in Rudrasagar.
- Ranchi is the capital of Jharkhand, India. There is no oil refinery in Ranchi.