Question

Which of the following statements is not true about the following compounds?

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

Answer 1

The correct option is A (I) and (III) are identical

I and II have different positions of $\pi$ - bond, these are positional isomers.
Also, II and III are positional isomers.
I and III are geometrical isomers i.e. cis-trans isomerism.