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': 'Leukocyte adhesion to endothelium is mediated by all except ? \nSelect and explain. \nA. L selectin, B. E selectin, C. VCAM 1, D. VCAM 4', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., VCAM 4", 'role': 'assistant'}]