Assertion :lt can be seen that in proper ventilation of a building, window must be open near the bottom and the top of the halls.
Reason: Cool air enters from base and hot air leaves at ths top.

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
Cool air is heavier than hot air.
Hence, cool air enters from the bottom and hot air leaves from the top.

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Assertion :lt can be seen that in proper ventilation of a building, window must be open near the bottom and the top of the halls. Reason: Cool air enters from base and hot air leaves at ths top.

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for AssertionCool air is heavier than hot air.Hence, cool air enters from the bottom and hot air leaves from the top.

Assertion :lt can be seen that in proper ventilation of a building, window must be open near the bottom and the top of the halls.
Reason: Cool air enters from base and hot air leaves at ths top.

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
Cool air is heavier than hot air.
Hence, cool air enters from the bottom and hot air leaves from the top.