In which year was the fourth oil refinery of Assam started at Numaligarh?

The correct answer is 1999. Key Points The Numaligarh Refinery is the fourth oil refinery in Assam and is commonly referred to as the "Assam Accord Refinery." It was inaugurated in 1999 to fulfill the terms of the Assam Accord signed in 1985. Located in Numaligarh, Golaghat district, it is one of the most significant industrial developments in Assam. The refinery was established to boost the socio-economic development of the region and reduce Assam's dependence on external resources for petroleum products. Additional Information 1919: This year does not correlate to the establishment of any oil refinery in Assam. However, it is notable as a significant year in Indian history when the Jallianwala Bagh massacre occurred, which sparked nationwide protests against British rule. 1991: While this year does not mark the establishment of the Numaligarh Refinery, it is significant in Indian history as the year of economic liberalization. India initiated major economic reforms under the leadership of Prime Minister P.V. Narasimha Rao and Finance Minister Dr. Manmohan Singh. 1989: This year is not related to the Numaligarh Refinery but is noteworthy as it saw the fall of the Berlin Wall, marking the end of the Cold War. In India, the year marked political changes, including the emergence of coalitions in governance.