Correct Option: B

Operation Flood in India, a project of the National Dairy Development Board (NDDB) was the world's biggest dairy development program which made India, a milk-deficient nation, the largest milk producer in the world, surpassing the USA in 1998, with about 17 percent of global output in 2010-11, which in 30 years doubled the milk available per person, and which made dairy farming India's largest self-sustainable rural employment generator.