Which of the following is incorrect regarding tryptophan?

It is a non-polar amino acid  It has an aromatic side chain It is a basic amino acid It is an essential amino acid

It is a basic amino acid

Tryptophan is an essential amino acid with bicyclic aromatic side chain, indole. It cannot be synthesized by the human body and must be taken for nitrogen balance in the body. It has one amino and carboxyl group each and is a neutral amino acid.