Question

Which of the following functional group(s) shows metamerism?

• A. $-O-$
• B. $-S-$
• C. $-NH-$
• D. $-OH$

Answer 1

Answer: (A), (B), (C), (D)

The correct options are
A $-O-$
B $-S-$
C $-NH-$
D $-OH$

Metamerism :
Structural isomers in which there is a difference in the relative position of alkyl group around polyvalent atom/functional groups.
In options (a), (b) and (c) the relative position of alkyl groups around the functional group can be different. So, they show metamerism.
Apart from the given groups, other groups that show metamerism include :