This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Adrenergic System, Subject name: Pharmacology
[{'content': 'Atenolol is indicated in all except \nSelect and explain. \nA. Hypertension, B. Partial heart block, C. Hypertrophic obstructive cardiomyopathy, D. Classical angina', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. (B) Partial heart block(Ref: KDT 8th/e p160-161)b -blockers are contraindicated in partial or complete heart block as they cause bradycardia.', 'role': 'assistant'}]