Enzymes in glycogen metabolism: (A) Phosphorylase a, (B) Phosphorylase b, (C) Glycogen Synthase II, (D) Glycogen Synthase C
Answer is A. The liver phosphorylase-b is the inactive form. It becomes active on phosphorylation. The active enzyme is denoted as phosphorylase-a.Ref: DM Vasudevan, page no: 127