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': 'A patient, Sunder is admitted to the emergency with severe bradycardia following drug overdose. The concerned drug was being taken for hypertension. Which of the following cannot be the drug ? \nSelect and explain. \nA. Clonidine, B. Hydralazine, C. Propranolol, D. Reserpine', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]