Correct answer is (C) NW 1
The National Waterway 1 (NW 1) connects Allahabad and Haldia. It is the longest national waterway in India, with a total length of 1,620 kilometers. It follows the Ganga-Bhagirathi-Hooghly river system and passes through the states of Uttar Pradesh, Bihar, Jharkhand, and West Bengal.