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': 'Most impoant for diapedesis ? \nSelect and explain. \nA. PECAM, B. Selectin, C. Integrin, D. Mucin like glycoprotein', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., PECAMo Platelet endothelial cell adhesion molecule (PECAM or CD-31) is present on both endothelium and leukocytes. o It is the major adhesive molecule for diapedisis.", 'role': 'assistant'}]