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
Facial plane is formed by 
Select and explain. 
A. Sella gnathion, B. Sella nasion, C. Nasion pogonion, D. Nasion subspinale
C: Nasion pogonion
Answer: C: Nasion pogonion 
Explanation: None