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
Which of the following drug is not a GPIIb / III a antagonist? 
Select and explain. 
A. Tirofiban, B. Abciximab, C. Eptiifibatide, D. Prasugrel
D: Prasugrel
Answer: D: Prasugrel 
Explanation: Prasugrel is an antagonist of P2 Y12 receptors of ADP like clopidogrel.