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': 'Diapedesis is - \nSelect and explain. \nA. Immigration of leucocytes through the basement membrane, B. Immigration of the leucocytes through the vessel wall to the site of inflammation, C. Aggregation of platelets at the site of bleeding, D. Auto digestion of the cells.', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Immigration of the leucocytes through the vessel wall to the site of inflammationo Diapedesis is the process of transmigration of leukocytes across the endothelium. The most impoant molecule responsible for diapedesis is called PECAM-1 (Platelet endothelial cell adhesion molecule) or CD-31.", 'role': 'assistant'}]