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
Which leukotriene is the adhesion factor for the neutrophil on the cell surface to attach to endothelium-( 
Select and explain. 
A. B4, B. C4, C. D4, D. E4
A: B4
Answer: A: B4 
Explanation: Ans. is 'a' i.e., B4 Note : LTB4 is a chemotactic factor