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
[{'content': "Citelli's angle is - \nSelect and explain. \nA. Solid angle, B. CP angle, C. Sinodural angle, D. Part of Mac Evans triangle", 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]