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Assertion : If an electric fan be switc...

Assertion : If an electric fan be switched on in a closed room, the air of the room will be cooled. Reason : Fan air decrease the temperature of the room.

A

If both assertion and reason are true and the reason is the correct explanation of the assertion.

B

If both assertion and reason are true but reason is not the correct explanation of t he assertion.

C

If assertion is true but reason is false.

D

If the assertion and reason both are false

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The correct Answer is:
D
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