Official Answer Key & Detailed Solution
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Correct Answer: Option (C) — Kolkata-Hajira
Concept & Option Breakdown
Standard Reference VerifiedAmong the given legacy national highway routes:
- Kolkata–Hajira (old NH 6) spanned approximately 1,946 km, connecting West Bengal to Gujarat across central India.
- Chennai–Thane (old NH 4) was about 1,235 km.
- Agra–Mumbai (old NH 3) was about 1,190 km.
- Pune–Machilipatnam (old NH 9) was about 841 km.
Kolkata to Hajira spans the entire width of the subcontinent from the east coast to the west coast (West Bengal to Gujarat), making it inherently much longer than the other regional/connecting routes.
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