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': 'In urea cycle which defect is an X linkeddisease ? \nSelect and explain. \nA. Ornithine transcarbamylase, B. Aspaate transcarbamylase, C. Arginase, D. Argininosuccinate synthase', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Ornithine transcarbamylase", 'role': 'assistant'}]