Amongst the following, which group of states of India have oil fields?

The correct answer is Assam, Gujarat, Maharashtra, Andhra Pradesh. Key Points Additional Information Assam is the largest oil-producing state of India. Gujarat is also a major oil-producing state and India's largest oil refinery is also located in Gujarat. Maharashtra and Andhra Pradesh also have significant oil reserves. India's oil production meets only about 20% of its domestic demand, the rest is imported.