The correct answer is option 1, 1970. `Operation Flood` was launched in India in 1970. It was the world`s largest dairy development program, initiated by the National Dairy Development Board (NDDB) of India. The main goal of Operation Flood was to improve milk production and distribution in the country. This program introduced the concept of milk cooperatives, where farmers would collectively manage the procurement, processing, and marketing of milk. It aimed to enhance the livelihoods of small-scale farmers by providing them with fair prices for their milk and ensuring a regular and reliable supply of milk to consumers. Operation Flood played a significant role in transforming India from a milk-deficient nation to the largest producer of milk in the world.