Which of the following molecules is expected to rotate the plane polrized light?

Options

A.
B.
C.
D.

Answer

A

Explanation

The plane of polarized light is rotated by optically active compound, i.e. it should be chiral.
So, (a) has, chiral C-atom. So, it is optically active. In (b), (c) and (d) plane of symmetry is present.