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
Leukocyte adhesion to endothelium is mediated by all except ? 
Select and explain. 
A. L selectin, B. E selectin, C. VCAM 1, D. VCAM 4
D: VCAM 4
Answer: D: VCAM 4 
Explanation: Ans. is 'd' i.e., VCAM 4