Assertion (A): In the deep ocean, primary production occurs near hydrothermal vents.
Reason (R): Over there, microbes produce food through chemosynthesis which forms the basis for a food-chain. Codes

Options

A. Both A and Rare individually true and R is the correct explanation of A
B. Both A and R are individually true but R is not the correct explanation of A
C. A is true but R is false
D. A is false but R is true

Answer

B