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': 'FHP is formed by joining \nSelect and explain. \nA. Porion and Orbitale, B. Nasion and sella, C. Porion and sella, D. Porion and Nasion', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]