The First Five Year Plan (1951-1956) was drafted by:

The First Five Year Plan (1951-1956) was drafted by:

P C Mahalanobis
K N Raj
J C Kumarappa
Jawaharlal Nehru
This question was previously asked in
UPSC NDA-2 – 2015
The First Five Year Plan (1951-1956) of India focused primarily on agricultural development, irrigation, and power projects. While the plan was guided by the Planning Commission under the chairmanship of Jawaharlal Nehru and influenced by economic models like the Harrod-Domar model, the technical drafting and significant intellectual contribution came from economists. K. N. Raj (Kakkadan Nandanath Raj) was a key economist involved in the formulation of the First Five Year Plan. P. C. Mahalanobis is most prominently associated with the Second Five Year Plan and the Mahalanobis model.
K. N. Raj, a distinguished economist, played a crucial role in the drafting and formulation of India’s First Five Year Plan.
K. N. Raj’s contributions included emphasizing the need for public investment in agriculture and infrastructure during the initial phase of planning. He was a close associate of Nehru and a prominent figure in early Indian economic policy-making. While Nehru chaired the Planning Commission, the technical and detailed planning work was done by economists and experts, among whom K. N. Raj was a key member for the First Plan.