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
[{'content': 'Which of the following helps in movement and adhesion ? \nSelect and explain. \nA. MCP1, B. PGE2, C. LTB4, D. CD31', 'role': 'user'}, {'content': 'Answer: D \nExplanation: 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', 'role': 'assistant'}]