Which of the following amino acids are aromatic in nature?

Histidine Methionine  Isoleucine Proline

Histidine

Amino acids can be aromatic only if their side chain consists of an aromatic compound. Methionine has a sulphur containing straight chain. Isoleucine has an isobutyl side group. Proline has a complex cyclic side chain. Histidine has a basic aromatic side group, imidazole.