In the groups of amino acids indicated below, which one has side chain containing hydroxylic groups?

Q. In the groups of amino acids indicated below, which one has side chain containing hydroxylic groups?

A.            Serine, threonine, tyrosine

B.            Leucine, valine

C.            (C) Cysteine, methionine

D.            Glutarnine, tyrosine, serine

Answer: Serine, threonine, tyrosine