Assertion :The earth's magnetic field is due to iron present in its core. Reason: At a high temperature magnet losses its magnetic property or magnetism.

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
The earth has huge mass of molten iron inside which are in current form and thus earth has magnetism and
At curie temperature which is specified for each magnetic element individually at which if heated it loses magnetism.
But earth's magnetism is not due to the curie temperature.

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