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: Surgery
Head shaking test is done to diagnose 
Select and explain. 
A. Maxillary sinusitis, B. Vertigo, C. Position of root in relation to maxillary antrum, D. Maxillary fracture
C: Position of root in relation to maxillary antrum
Answer: C: Position of root in relation to maxillary antrum 
Explanation: None