Consider the following pairs : National Highway : Cities connected 1. NH 4 : Chennai and Hyderabad 2. NH 6 : Mumbai and Kolkata 3. NH 15 : Ahmedabad and Jodhpur Which of the above pairs is/are correctly matched?

Option (d) is correct because all three pairs are mismatched: NH 4 connected Mumbai and Chennai, NH 6 linked Surat to Kolkata, and NH 15 connected Pathankot to Samakhiali. Option (a) is a common trap because while NH 6 is a major trans-continental highway connecting the west and east coasts, its western terminus is Surat rather than Mumbai. The core concept tested is the spatial orientation and terminal cities of India’s major National Highways under the old numbering system.