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: ENT
Citelli's angle is - 
Select and explain. 
A. Solid angle, B. CP angle, C. Sinodural angle, D. Part of Mac Evans triangle
C: Sinodural angle
Answer: C: Sinodural angle 
Explanation: None