The idea of planning in independent India was drawn from the Bombay Plan. The Bombay Plan was a set of proposals put forward by a group of leading Indian industrialists in 1944. They believed that the Indian economy needed a planned approach to ensure rapid industrialization and development. The Bombay Plan emphasized the need for a mixed economy with active government intervention to promote industrial growth and reduce poverty.

Option 2, the demand made by peasants, is not the correct answer. While the demands of peasants for land reforms and better living conditions did have an influence on the planning process, the specific idea of planning in India was not drawn from their demands.

Option 3, the demand made by workers` unions, is also not the correct answer. While the demands of workers` unions for improved working conditions and labor rights were important in shaping India`s economic policies, they did not directly inspire the concept of planning.

Option 4, the Gandhian vision of India`s future, is not the correct answer. While Mahatma Gandhi had a significant impact on the Indian independence movement and his principles of self-sufficiency and village-based economy influenced certain aspects of planning, the idea of planning in India was not directly drawn from his vision.

Therefore, the correct answer is option 1,