Correct Answer: Option C - Both 1 and 2
The Ganga River forms one of the world's largest and most fertile deltas before emptying into the Bay of Bengal. This question tests knowledge about the distributaries of the Ganga in its deltaic region:
Bhagirathi-Hooghly flows through deltaic plains in India: This statement is correct. The Bhagirathi-Hooghly is a major distributary of the Ganga River that branches off from the main channel in West Bengal, India. It flows southward through the deltaic plains of West Bengal, passing through Kolkata before emptying into the Bay of Bengal.
Meghna flows through deltaic plains in Bangladesh: This statement is also correct. The Meghna River is formed by the joining of several rivers including the Surma and Kushiyara. It receives waters from the Ganga (known as Padma in Bangladesh) and Brahmaputra (known as Jamuna in Bangladesh) systems. The Meghna flows through the eastern part of the Ganges Delta in Bangladesh before emptying into the Bay of Bengal.
The Ganges Delta, also known as the Sundarbans Delta, is spread across both India and Bangladesh, with the western part in India (dominated by the Hooghly) and the eastern part in Bangladesh (where the Meghna flows).