Assertion :Deep sea divers carry oxygen cylinders with them. Reason: The deficiency of oxygen in bottom waters changes the type of organisms also. They are mostly small and fast-growing and can tolerate low concentrations of oxygen. At the bottom only bacteria and fungi can survive.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.

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Assertion is correct but Reason is incorrect.

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Both Assertion and Reason are incorrect.

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Solution

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion.
Divers carry oxygen cylinders with them as the bottom of sea has low levels of oxygen also known as hypoxia. The deficiency of oxygen in bottom waters changes the type of organisms also. They are mostly small and fast growing and can tolerate low concentrations of oxygen. At bottom only bacteria and fungi can survive.

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