Assertion :A non-stretchable string or thread is used to measure the length of a curved line. Reason: A scale is straight and it is hard to bend for getting the correct measurement of the curve line

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
Since the scale is a straight and it is very hard to bend it for getting the correct measurement of the curve line. Thus we need much more flexible measuring thing to measure the curve line. So, a non-stretchable string or a thread is used to measure the length of curved line. Hence, both the assertion and reason statement are correct and reason explains the assertion very well.

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