Question

Which of the given statement(s) about N, O, P and Q with respect to M is incorrect?

• A. M and N are non mirror image stereoisomers
• B. M and O are identical
• C. M and P are enantiomers
• D. M and Q are identical

Answer 1

The correct option is D M and Q are identical

Converting all of them into Fischer projection.

Since, M and N have $–OH$ on same side and opposite side respectively, they cannot be mirror image, they are diastereomers.


M and O are identical.
Note Fischer projection represents eclipse form of Sawhorse projection.
For comparison purpose, similar types of eclipse conformers must be drawn i.e., both vertically up and down.

M and P are non-superimposable mirror images, hence, they are enantiomers.


M and Q are diastereomers.