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 of following does not lie on the mandible: \nSelect and explain. \nA. Pogonion, B. Porion, C. Menton, D. Gnathion', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]