This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Inflammation & Repair, Subject name: Pathology
True about thromboxane-A2 is? 
Select and explain. 
A. Vasodilatation, B. Platelet aggregation, C. Potentiation of edema, D. Formed in endothelium
B: Platelet aggregation
Answer: B: Platelet aggregation 
Explanation: Ans. is 'b' i.e., Platelet aggregation