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Question

The given compound is optically inactive due to the presence of

A
Plane of symmetry
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B
Molecular asymmetry
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C
External compensation
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D
Two asymmetric C-atoms
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Solution

The correct option is A Plane of symmetry
The given compound is optically inactive due to the presence of plane of symmetry.
Plane of symmetry corresponds to the internal compensation in the meso compounds.
Due to plane of symmetry, optical rotations of upper and lower parts are equal and in the opposite direction which balances internally and compound becomes optically inactive.

Generally, asymmetric carbon in the compound makes the molecule chiral and leads to optical activity. But this is not in all the cases.

Hence, option (a) is the correct answer.

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