This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General pathology, 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. Ci activators
B: Thromboxane A2
Answer: B: Thromboxane A2 
Explanation: TXA2- causes platelet aggregation and vasoconstriction PGI2 - inhibit platelet aggregation LTB4- chemotactic C5 is a complement robbins 9th ed page 84