The correct answer is: a) Jiribam.
The exploration and extraction of oil and natural gas are being explored in the Jiribam region of Manipur. The Jiribam region is located in the southern part of Manipur, and it is bordered by the states of Assam and Nagaland. The Jiribam region is a mountainous region, and it is home to a number of rivers, including the Barak River and the Manipur River. The Jiribam region is also home to a number of forests, and it is a popular tourist destination.
The exploration and extraction of oil and natural gas in the Jiribam region is being carried out by a number of companies, including the Oil and Natural Gas Corporation (ONGC) and the Hindustan Petroleum Corporation (HPCL). The exploration and extraction of oil and natural gas in the Jiribam region has been met with some opposition from local communities, who are concerned about the environmental impact of the activity. However, the exploration and extraction of oil and natural gas is seen as a potential source of revenue for the state of Manipur, and it is likely to continue in the future.
The other options are incorrect because they are not regions of Manipur where oil and natural gas are being explored. Option b, Churachandpur, is a district in Manipur. Option c, Tamenglong, is a district in Manipur. Option d, Thoubal, is a district in Manipur.