The correct answer is: A. First plan
The First Five-Year Plan (1951-1956) was the first of India’s five-year plans. The plan focused on agriculture and infrastructure development, with the goal of increasing agricultural production and improving transportation and communication networks. The plan allocated 20% of the total plan expenditure to agriculture, which was the highest percentage of any of the five-year plans.
The Second Five-Year Plan (1956-1961) focused on industrialization, with the goal of increasing the production of capital goods and consumer goods. The plan allocated 16% of the total plan expenditure to agriculture, which was a lower percentage than in the First Five-Year Plan.
The Sixth Five-Year Plan (1980-1985) focused on rural development, with the goal of increasing agricultural production and improving the quality of life in rural areas. The plan allocated 18% of the total plan expenditure to agriculture, which was a higher percentage than in the Second Five-Year Plan.
The Ninth Five-Year Plan (1997-2002) focused on economic reforms, with the goal of increasing economic growth and reducing poverty. The plan allocated 14% of the total plan expenditure to agriculture, which was a lower percentage than in the Sixth Five-Year Plan.
In conclusion, the First Five-Year Plan allocated the highest percentage of the total plan expenditure to agriculture, at 20%. The Second Five-Year Plan allocated 16% of the total plan expenditure to agriculture, the Sixth Five-Year Plan allocated 18% of the total plan expenditure to agriculture, and the Ninth Five-Year Plan allocated 14% of the total plan expenditure to agriculture.