This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Platelet, Subject name: Pathology
A 60-year-old man with unstable angina is treated with an intravenously administered glycoprotein IIb-IIIa inhibitor. The mechanism of action of this agent is the ability to 
Select and explain. 
A. Dilate coronary aeries., B. Inhibit atherogenesis., C. Inhibit platelet adhesion., D. Inhibit platelet aggregation.
D: Inhibit platelet aggregation.
Answer: D: Inhibit platelet aggregation. 
Explanation: Glycoprotein IIb-IIIa inhibitors Prevent the action of the platelet surface receptor glycoprotein complex, which is required for formation of fibrinogen bridges between adjacent platelets Thus inhibiting platelet aggregation. Ex- TICLOPIDINE,CLOPIDOGREL,PRASUGREL