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': 'which of the following drug can worsen angina: \nSelect and explain. \nA. Thyroxine., B. Dipyridamole., C. Sumatriptan., D. All of the above.', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Dipyridamole results in coronary steal phenomenon.Thyroxine cause tachycardia. Sumatriptan cause coronary vasoconstriciton. Hence all these drugs worsen the angina', 'role': 'assistant'}]