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
In Lipooxygenase pathway, the formation of the arachidonic acids products which of the following helps in the promote platelet aggregation and vasoconstriction - 
Select and explain. 
A. C5a, B. Thromboxane A2, C. Leukotriene B4, D. C1 activators
B: Thromboxane A2
Answer: B: Thromboxane A2 
Explanation: Ans. is 'b' i.e., Thromboxane A2