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 of the following helps in movement and adhesion ? 
Select and explain. 
A. MCP1, B. PGE2, C. LTB4, D. CD31
D: CD31
Answer: D: CD31 
Explanation: Answer- D. CD31Platelet enilothelial cell ailhesion molecule (PECAM or CD-31) is present on both enilothelium and leukocytes. It is the major adhesive molecule for diapedisis