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': 'Tirofiban is a : \nSelect and explain. \nA. Monoclonal antibody, B. Antiplatelet drug, C. Anti-inflammatory drug, D. Antianginal drug', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]