This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Biochemistry
[{'content': 'Enzymes not used in glycogen metabolisma) Glycogen phosphorylase Bb) Glycogen synthase Ic) Glycogen synthase Cd) Glycogen synthase A \nSelect and explain. \nA. ab, B. ad, C. bd, D. bc', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Glycogen synthase 1 & Glycogen synthase C', 'role': 'assistant'}]