This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiratory system, Subject name: Pharmacology
[{'content': 'Which of the following drugs does not act by blocking GP 2b/3a receptors \nSelect and explain. \nA. Eptifibadite, B. Abciximab, C. Tirofiban, D. Clopidogrel', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Refer KDT 6 /e p 610 Clopidogrel inhibits ADP receptors whereas abciximab, tirigina, and eptifibadite are GP 2b/3a antagonists', 'role': 'assistant'}]