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': 'Not a family of selectin \nSelect and explain. \nA. P selectin, B. L selectin, C. A selectin, D. E selectin', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]