Assertion :Both cis-1,3-dimethyl cyclobutane and trans-1,3-dimethyl cyclobutane are optically inactive. Reason: cis-1,3-Dimethyl cyclobutane has the plane of symmetry, where as trans form has the centre of symmetry.

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
Both cis-1,3-dimethyl cyclobutane and trans-1,3-dimethyl cyclobutane are optically inactive
cis-1,3-Dimethyl cyclobutane has the plane of symmetry, where as trans form has the center of symmetry
If a compound contains an element of symmetry, it will be optically inactive.
Thus, both Assertion and Reason are correct and Reason is the correct explanation for Assertion.

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