The correct answer is: Anand, Gujarat.
Operation Flood was a dairy development program launched in India in 1970. It was a cooperative program that aimed to increase milk production and productivity in India. The program was closely linked to Anand, Gujarat, which is the home of the Amul Dairy Cooperative. The Amul Dairy Cooperative was founded in 1946 by Dr. Verghese Kurien, who is considered the father of the White Revolution in India. The Amul Dairy Cooperative played a key role in the success of Operation Flood.
The other options are incorrect because they are not closely linked to Operation Flood. Banaskantha, Gujarat is a district in Gujarat, India. Valsad, Gujarat is a district in Gujarat, India. Bharuch, Gujarat is a district in Gujarat, India.