What is the absolute configuration of the following molecules ? (NS = the molecule has no center) Note : For the purpose of this question only, the order of stereocenters is not specified , i.e., R, S = S, R.

Options

A. `{:(I,II,III,IV),(R,"R,S",R,"NS"):}`
B. `{:(I,II,III,IV),(R,"R,R",S,"R,R"):}`
C. `{:(I,II,III,IV),(R,"R,S","NS","NS"):}`
D. `{:(I,II,III,IV),(R,"R,S","R","R,S"):}`

Answer

D

Explanation

All molecules have chiral centres and have configurations.