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': 'Among the following the drug which is contraindicated in HOCM is: \nSelect and explain. \nA. Beta blockers, B. Verapamil, C. Digitalis, D. Amiodarone', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Digitalis', 'role': 'assistant'}]