Which of the following statement(s) is/are true about the following compounds?

Options

A. (I) and (III) are identical
B. (I) and (III) are geometrical diastereomers
C. (I) and (II) are structural isomers.
D. (II) and (III) structural isomers.

Answer

B, C, D

Explanation

I and II have different positions of `pi`-bond, these are positional isomers. Similarly II and III are also positional isomers.
I and III are geometrical isomers.