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': 'In LVF,  the drug which can be administered is: \nSelect and explain. \nA. Propranolol, B. Morphine, C. Amlodipine, D. Epinephrine', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]