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: Pharmacology
[{'content': 'Most common cytochrome associated with metabolism of drugs is ? \nSelect and explain. \nA. CYP3A4/5, B. CYP2D6, C. CYP2C8/9, D. CYP2Cl.9', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., CYP3A4/5 Cyp 3 A 4/5 carryout biotransformation of largest number (nearly 50%) of drugs.", 'role': 'assistant'}]