उत्तर : 4. "महाराष्ट्र"
व्याख्या :

Maharashtra leads states in terms of the construction of national highways. In 2017-18, it built 1,345 km, followed by Rajasthan and Karnataka. The state also holds the distinction of having the highest NH network, spanning 17,749 km and racing ahead of Uttar Pradesh with 11,476 km in the network.