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': 'Adverse effects of beta–blockers may include: \nSelect and explain. \nA. Congestive heart failure, B. Blunting of sympathetic response of oral hypoglycemic drugs, C. Bronchial asthma, D. All of above', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]