Explanation:

- The Second Five-Year Plan (Option 3) focused on industrialization. The emphasis shifted from agriculture to industries during this plan. Heavy industries and the public sector were highlighted.

- The First Five-Year Plan was primarily focused on agriculture. It aimed to improve agricultural productivity and infrastructural development.

- The Third Five-Year Plan (Option 1) aimed at self-reliant growth and put a balanced emphasis on both agriculture and industry.

- The Fourth Five-Year Plan (Option 2) emphasized growth with stability and progressive achievement of self-reliance but continued to stress on both agriculture and industry, not a shift.

- The Fifth Five-Year Plan (Option 4) focused on removing poverty and achieving self-reliance, without a major sectoral preference shift.