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': 'Which of the following is not metabolized by liver ? \nSelect and explain. \nA. Flunitrazepan, B. Diazepam, C. Oxazepam, D. Nitrazepam', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Oxazepam o Active metabolites are not formed by Oxazepam, Lorazepam, Temazepam --> So these drugs are sho acting and can be used in liver failure as these drugs are directly conjugated without metabolism.", 'role': 'assistant'}]