Question

Which of the following will show optical activity ?
A)
B)
C)
D)
E) 50/50 mixture of C and D

• A. A , D and E
• B. A and E
• C. B, C and D
• D. Only A

Answer 1

The correct option is D Only A

The compounds which do not have plane & centre of symmetry are optically active. In structure A, there is no symmetry available and is optically active.
Structure B contains plane of symmetry and it is a meso compound. Structures C and D are meso compounds due to plane of symmetry. The $50/50$ mixture of meso compounds is also optically inactive. Hence, option (d) is correct.