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': '"Hairy Tongue" is a condition in which certain structures become enlarged. \nSelect and explain. \nA. Fungiforrn papillae, B. Filiform papillae, C. Circumvallate papillae, D. Taste buds', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]