Q.

The compound which shows metamerism is          [2021]

1 C4H10O  
2 C5H12  
3 C3H8O  
4 C3H6O  

Ans.

(1)

Metamerism occurs when the compound has different number of carbon atoms on either side of the functional group. Metamers of C4H10O:

CH3-O-CH2CH2CH3Methylpropyl etherCH3CH2-O-CH2CH3Diethyl ether