Which of the following statements is not correct?

Options

A. All geometrical isomers are diastereomers
B. All diastereomers are chiral and optically active
C. Diasteromers are not necessairly chiral and optically active
D. Enantiomers are essenticallty chiral and optically active.

Answer

B

Explanation

Diasteromers alkenes such cis-and trans-but`-2`-ene are achiral as they posses a plane of symmetry (the plane in which molecule lies is a plane of symmetry).