0. The longest highway in India runs from
The longest highway in India is National Highway 44, running from Jammu to Kanyakumari.
A. Kolkata to Jammu – Incorrect. Not the longest route.
B. Jammu to Kanya Kumari – Correct. NH 44, India's longest highway.
C. Ambala to Nagercoil – Incorrect. Does not span the full length of NH 44.
D. Varanasi to Kanya Kumari – Incorrect. Shorter segment.