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': 'When leukocytes are arranged along the endothelium of blood vessels it is called - \nSelect and explain. \nA. Diapedesis, B. Adhesion, C. Margination, D. Chemotaxis', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Margination", 'role': 'assistant'}]