The correct option is B Second
The second five year plan (1956-1961) emphasised on long-term economic growth and hence patronised the development of basic and heavy industries. It followed the Mahalanobis model of development, prepared by an Indian statistician Prasanta Chandra Mahalanobis. During this period, five hydroelectric power plants and steel plants were established in Bhilai, Durgapur and Rourkela.