Answer (4)- Production of Wheat- Green revolution refers to a period when Indian Agriculture was converted into an industrial system due to the adoption of modern methods and technologies such as the use of High Yielding Variety Seeds, irrigation facilities, pesticides, and fertilizers.
M.S. Swaminathan is considered the 'Father of Green Revolution' in India. HYV seeds were developed by Prof. Norman Borlaug.
It commenced in 1965 that led to an increase in food grain production (most useful for wheat production), especially in Punjab, Haryana, and Uttar Pradesh.