The Ganga river finally drains into which bay?

Correct answer: Bay of Bengal

The Ganga is one of the major east-flowing rivers of the Indian subcontinent. After receiving water from many tributaries and flowing across the northern plains, it reaches the delta region in the east. There it divides into distributaries and finally empties into the Bay of Bengal. Its delta is closely connected with the Brahmaputra system and the coastal waters of the bay.

Choice A, Bay of Bengal, is correct. The Gulf of Kachchh and Gulf of Khambhat are in western India, while the Arabian Sea is also west of the peninsula. Those water bodies do not receive the main final flow of the Ganga. Thus the river’s broad eastward course and its deltaic outlet identify the Bay of Bengal as the correct answer.