Correct Option: C

West Bengal is a state in the eastern region of India and is the nation’s fourth-most populous. It is bordered by the countries of Nepal, Bhutan, and Bangladesh, and the Indian states of Orissa, Jharkhand, Bihar, Sikkim, and Assam. West Bengal is only state in India where Himalayas are in the north and Sea is at the south, with both plains and plateaus covering the remaining region.