This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Platelet & Coagulation disorders, Subject name: Medicine
[{'content': 'Which of the following drugs does not act by blocking GpIIb/IIIa receptors? \nSelect and explain. \nA. Abciximab, B. Eptifibatide, C. Tirofiban, D. Clopidogrel', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Clopidogrel inhibits ADP receptors whereas Abciximab, Tirofiban and Eptifibatide are GP IIb/IIIa antagonists.', 'role': 'assistant'}]