Assertion :Steel and brass are more elastic than copper and aluminium. Reason: That's why they are preferred in heavy-duty machines and in structural designs.

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 D Both Assertion and Reason are incorrect

Elastic order of these materials are:
Steel> copper> brass >aluminum.
Because of this reason steel is preferred in heavy-duty, machines and in structural designs.

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