Assertion :Net primary productivity is less than the grass primary productivity Reason: Only a part of incident energy is utilised in photosynthesis

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
Net primary productivity (NPP) I given by Gross Primary Productivity (GPP) minus Respiration loses (R). A fraction of the GPP is used for respiration in plants. So, NPP <GPP. Only a part of incident energy is utilised I photosynthesis. However, it isn't a reason for lower NPP.
So, the correct answer is option B.

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