Which one of the following pairs of isomers is an example of metamerism?

Compounds given in option $\left(\mathrm{A}\right)$ are chain isomers.

Compounds given in option $\left(\mathrm{B}\right)$ are not isomers since molecular formula is not same.

Compounds given in option $\left(\mathrm{C}\right)$ are position isomers.

Distribution of alkyl groups around polyvalent functional group $(-\mathrm{O}-, -\mathrm{CO}-, -\mathrm{COO}-\text{ etc.})$give rise to metamers and phenomenon is called metamerism.