Answer: (Detailed Solution Below)
Option A: The Ganga between Haldia and Allahabad
Detailed Solution:
The correct answer is “The Ganga between Haldia and Allahabad”.
The NW-1 stretch from Allahabad to Haldia is known as the Ganga-Bhagirathi-Hooghly river system (1620km). This waterway was declared in 1986 as a National Waterway.