'Grey Revolution' is related to :

Correct option is B

The "Grey Revolution" refers to the significant increase in fish production, particularly in the context of aquaculture. This term is often associated with the development and expansion of fish farming practices, which allowed for higher yields and more sustainable production of fish.

While the "Green Revolution" is related to increased agricultural production (mainly crops like wheat and rice), the "Grey Revolution" specifically refers to advancements in the fishery sector, including the development of aquaculture techniques and the growth of fish farming, especially in coastal areas.