National Highway 4 or NH 4: It is 230.7 km in length. This highway is known as the Andaman Trunk Road (The Great Andaman Trunk Road). Pair 1 is incorrect: A stretch of national highway from Mumbai to Pune to Hubli to Bangalore to Chennai was earlier called NH 4 before the renumbering of national highways in the year 2010. The former NH 4 is now renumbered as NH 48. Pair 2 is incorrect: National Highway 6 is a national highway in India running from Jorabat in Meghalaya to Selling in Mizoram. The highway passes through the Indian states of Meghalaya, Assam, and Mizoram. Pair 3 is incorrect: National Highway 15 (NH 15) starts from Baihata in Assam and terminates at Wakro in Arunachal Pradesh.