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': 'Which of the following is a mitochondrial enzyme of Urea Cycle \nSelect and explain. \nA. Arginase, B. Carbamoyl Phosphate synthetase I, C. Arginosuccinate lyase, D. Arginosuccinate synthetase.', 'role': 'user'}, {'content': 'Answer: B \nExplanation: CPS - I is a mitochondrial enzyme and catalyses rate limiting step of Urea Cycle.\nAll the Cytoplasmic enzymes of urea cycle start with letter "A".', 'role': 'assistant'}]