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: Unknown
Leukocyte adhesion to endothelium is mediated by all except - 
Select and explain. 
A. L selectin, B. E selectin, C. VCAM1, D. VCAM4
D: VCAM4
Answer: D: VCAM4 
Explanation: Ans. is 'd' i.e., VCAM 4 Endothelial Leukocyte adhesion molecules and their functionsEndothelial moleculeWBC receptorMajor roleP-selectinSialyl-Lewis NRollingE-se lectinSialyl-Lewis XRolling, adhesion to activated endotheliumICAM-ICD 11/CD lS(integrins)Adhesion, arrest, transmigrationVCAM-1VLA-4.LPAM-]AdhesionGtycam-1L-selectinLymphocytes homing to high endothelial venulesCD 31 (PEC AM)CD31WBC migration through endothelium