This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Hematology, Subject name: Pharmacology
[{'content': 'Drug which inhibits GPIIb/IIIa and is platelet anti Aggregatory: \nSelect and explain. \nA. Clopidogrel, B. Enoxaparin, C. Fondaparinux, D. Tirofiban', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Ans. D. TirofibanGP IIb/IIIA are the fibrogen activator receptor. On stimulating they activates the aggregation of platelets. Abciximab and tirofiban are the drugs which block these receptors and inhibit the platelet aggregation.', 'role': 'assistant'}]