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 40–year–old politician suffered from attacks of chest pain diagnosed as angina pectoris. He had a tense personality, resting heart rate was 96/min blood pressure 170/104mm Hg, but blood sugar level and lipid profile were normal. Select the most suitable antihypertensive for the initial therapy in his case: \nSelect and explain. \nA. Nifedipine, B. Hydrochlorothiazide, C. Atenolol, D. Methyldopa', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]