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': 'All are Urea cycle enzymes except: \nSelect and explain. \nA. Ornithine transcarbamylase, B. Carbamoyl-phosphate synthetase I, C. Argininosuccinase, D. Citrulline synthase', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Answer: (D) Citrulline synthase [Ref Harper 30th/290-96, 29th/274-88; Lippincott', 'role': 'assistant'}]