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
Inhibitor of platelet aggregation includes 
Select and explain. 
A. TXA2, B. PGI2, C. PGG2, D. All of the above
B: PGI2
Answer: B: PGI2 
Explanation: None