Assertion :Light is very important factor in transpiration. Reason: It induces stomatal opening and darkness closing. Therefore transpiration increases in light and decreases in dark.

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 A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion.
Light induces opening of stomata and increase the temperature. Both of these factor help in increase of transpiration, while darkness causes closure of stomata and reduces the transpiration. Transpiration depends on closure and opening stomata.

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