Assertion (A) : The SI unit of length is metre.
Reason (R) : All the symbols of the fundamental units should be written as stated in SI.

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Both Assertion and Reason are correct and reason is the correct explanation of Assertion

Both Assertion and Reason are correct and reason is NOT the correct explanation of Assertion

Assertion is correct but the reason is INCORRECT

Both Assertion and Reason are INCORRECT

answer is A.

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Detailed Solution

Assertion is true that is the S.I unit of length is meter because all the symbols of the fundamental units should be refered as stated in S.I

Here we get both (A) and (R) are true and (R) is the correct explanation of A.

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