Assertion :If wind velocity is low the rate of transpiration is high. Reason: Wind removes humid air from around the leaf due to which a difference between the inner water vapour and outside is maintained.

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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Assertion is incorrect but Reason is correct.

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Solution

The correct option is D Assertion is incorrect but Reason is correct.
Transpiration is affected by humidity and wind velocity in addition to several other factors.
Increase in humidity decreases transpiration and vice versa.
Air movement or wind increases the rate of transpiration by bringing dry air and removing moist air around the transpiring material. Excessive high wind velocity however closes stomata.

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