Q. 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.

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• (A) Both (A) and (R) are 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