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 60 yr old male had a sudden fall in toilet. His BP was 90/50 mm Hg and pulse was 100/min. His relatives reported that his stool was black/dark in colour. Further careful history revealed that he is a known case of hypertension and coronary artery disease and was regularly taking aspirin, atenolol and sorbitrate. The most likely diagnosis is \nSelect and explain. \nA. Gastric ulcer with bleeding, B. Acute myocardial infarction with cardiogenic shock, C. Acute cerebrovascular accident, D. Pulmonary embolism', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]