National Waterway 1 is

a. Lakhipur to Bhanga

b. Sadiya — Dhubri

c. Allahabad–Haldia

d. Varanasi to Kolkata

ANSWER: Allahabad–Haldia

Explanation:

The National Waterway 1 or NW1 is located in India and runs from Haldia (Sagar) to Allahabad across the Ganges, Bhagirathi and Hooghly river systems.

It is 1620 km long, making it the longest waterway in India, NW1 passes through Uttar Pradesh, Bihar, Jharkhand and West Bengal.

It was declared as a waterway in October 1986. It is navigable by mechanical boat up to Patna.