The correct answer is: b) Bongaigaon.
Bongaigaon is an important center for the oil and natural gas industry in India. It is located in the state of Assam, on the banks of the Brahmaputra River. The city is home to the Bongaigaon Refinery and Petrochemicals Limited (BRPL), which is one of the largest refineries in India. BRPL is a joint venture between the Government of India and the Oil and Natural Gas Corporation (ONGC). The refinery has a capacity of 15 million tonnes per annum (MTPA) and produces a variety of products, including gasoline, diesel, kerosene, and LPG.
In addition to the refinery, Bongaigaon is also home to a number of other oil and gas companies, including ONGC, Oil India Limited (OIL), and GAIL India Limited. These companies have offices and facilities in the city, and they employ a large number of people.
The oil and gas industry is a major contributor to the economy of Bongaigaon. The industry provides jobs for a large number of people, and it also generates revenue for the government. The industry is also a major source of tax revenue for the government.
The oil and gas industry is a vital part of the economy of Bongaigaon. The industry provides jobs, revenue, and economic growth for the city. The industry is also a major source of tax revenue for the government.