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': 'Drug used in unstable angina & NSTM\n(A)Morphine\n(B)Aspirin\n(C)Nitrates\n(D)Anthrombocthera\n(E)CCB \nSelect and explain. \nA. BCDEA, B. CABED, C. DAECB, D. ABCDE', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]