The correct answer is (a) Gujarat.
Indiaâs largest petrochemical factory is the Jamnagar Refinery, located in Jamnagar, Gujarat. It is owned and operated by Reliance Industries Limited (RIL), and is one of the largest refineries in the world. The refinery has a capacity of 33 million tonnes per annum (mtpa), and produces a wide range of products, including gasoline, diesel, kerosene, LPG, naphtha, and petrochemicals.
The Jamnagar Refinery is a major contributor to the Indian economy, and employs over 20,000 people. It is also a major source of revenue for the Gujarat government.
The other options are incorrect.
(b) West Bengal is home to the Haldia Petrochemicals Complex, which is the second largest petrochemical complex in India. However, it is not the largest.
(c) Assam is home to the Numaligarh Refinery, which is the largest refinery in the northeast of India. However, it is not the largest in India.
(d) Tamil Nadu is home to the Chennai Petroleum Corporation, which is the second largest refinery in India. However, it is not the largest.