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: Dental
[{'content': 'Which cell type migrates into the gingival sulcus in large\nnumbers in response to dental plaque: \nSelect and explain. \nA. Mast cells, B. Neutrophils, C. Lymphocytes, D. Plasma cells', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]