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: Medicine
[{'content': 'A 25 year old patient complains of Crushing chest discomfort for 45 minutes, no significant medical history. ECG is normal. His chest pain improved with sublingual nitroglycerin diagnosis is \nSelect and explain. \nA. Diffuse esophagial spasm, B. Myocardial infarction, C. Anxiety attack, D. scleroderma', 'role': 'user'}, {'content': 'Answer: A \nExplanation: DES →\nChest pain simulate that of MI\nPain can be precipitated by drinking cold liquids.', 'role': 'assistant'}]