The correct answer is (c) 2001.
Operation Green is a scheme launched by the Government of India in 2001 to promote production of fruits, vegetables, and milk. The scheme provides financial assistance to farmers, cold storage facilities, and marketing infrastructure.
Option (a) is incorrect because the Green Revolution was launched in 1966. The Green Revolution was a period of agricultural development in India that began in the mid-1960s. The goal of the Green Revolution was to increase agricultural production to meet the needs of a growing population.
Option (b) is incorrect because the National Horticulture Mission was launched in 1998. The National Horticulture Mission is a scheme launched by the Government of India to promote the production and marketing of fruits and vegetables.
Option (d) is incorrect because the National Dairy Development Board was established in 1965. The National Dairy Development Board is a government-owned organization that promotes the development of the dairy industry in India.