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: Anatomy
[{'content': 'Circumvallate papillae are present: \nSelect and explain. \nA. Behind sulcus terminalis, B. Front of sulcus terminalis, C. Anterior 2/3 of tongue, D. Lateral border of tongue', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]