V and VI (metamers of ethers)

Explanation:

Metamerism is defined as the variation in arrangement of atoms around a bivalent functional group of same chain length. It is exhibited by ethers, esters, ketone, thioethers, secondary and tertiary ethers and such functional groups. Metamerism is similar to that of positional isomerism. Terminal functional groups such as alcohols, carboxylic acids, aldehydes, primary amines and such functional groups do not exhibit metamerism. So here in compounds V and VI the chain length is same but the distribution of carbons is different around oxygen atom.