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': 'Propanolol is useful for all of the following except ? \nSelect and explain. \nA. Angina, B. Familial tremor, C. Hypeension, D. Paial AV block', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., Paial AV block", 'role': 'assistant'}]