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
Pathognomic features of Maxillary sinusitis is - 
Select and explain. 
A. Mucopus in the middle meatus, B. Inferior turbinate hypertrophy, C. Purulent nasal discharge, D. Atrophic sinusitis
A: Mucopus in the middle meatus
Answer: A: Mucopus in the middle meatus 
Explanation: Characteristic finding of maxillary sinusitis on Rhinoscopy is pus or mucopus in in the middle meatus.
Mucosa and turbinates may appear red and swollen.

Remember: Dental infections are an important source of maxillary sinusitis.