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: Pathology
Inhibition of platelet aggregation by ? 
Select and explain. 
A. ADP, B. Thromboxane A2, C. Thrombin, D. Bradykinin
D: Bradykinin
Answer: D: Bradykinin 
Explanation: Ans. is 'd' i.e., Bradykinin