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': 'Nasion is situated at \nSelect and explain. \nA. Frontonasal suture, B. Zygomatic process, C. Orbital floor, D. None of above', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]