The Brahmaputra River originates from a glacier near Lake Mansarovar (also spelled Manasarovar) in Tibet, China. This region is called the Chemayungdung Glacier. Lake Mansarovar is a holy site in Hinduism and Buddhism. The river then flows through Arunachal Pradesh and Assam before entering Bangladesh. Options A (Pindari Glacier) is Ganga's source, C is vague, and D (Punjab) is incorrect.