Correct option is B
The Nagpur Road Plan was the first comprehensive attempt to develop a national road network in India. It was formulated by the Central Road Research Institute in 1943 and was in operation until 1963. The plan was based on the principle of linking major ports, state capitals, and large industrial centers with a network of national highways.
Under the Nagpur Road Plan, a total of 7,000 miles of highways were constructed, including the Grand Trunk Road that connects Kolkata to Delhi. The plan also involved the construction of bridges, flyovers, and other infrastructure to support the road network.