The Brahmaputra is known in its upper course as the Yarlung Tsangpo in Tibet. It originates in the Chemayungdung glacier region of the Kailash range, and it enters India in the vicinity of Namcha Barwa, where it takes a major bend before flowing through Arunachal Pradesh and Assam.
Both statements in the question describe its source and entry into India, so both are considered correct according to the source's answer key. The river is a major transboundary river of South Asia.
This fact is useful in physical and human geography because it connects the location, process, and characteristic asked in the question. In examination questions, compare the wording of each option carefully and identify the specific concept rather than choosing an answer based only on a familiar term.

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