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': 'Flumazenil is: \nSelect and explain. \nA. Opiate antagonist, B. Diazepam antagonist, C. Opiate agonist, D. Antianginal drug', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Diazepam antagonist', 'role': 'assistant'}]