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
Sinusitis in children is commoner in which sinus: 
Select and explain. 
A. Frontal, B. Maxillary, C. Ethmoid, D. Sphenoid
C: Ethmoid
Answer: C: Ethmoid 
Explanation: The commonest sinus involved was ethmoidal in children and mixed sinus pathology in adults. The majority of patients responded to medical treatment. CONCLUSION: Orbital complications of sinusitis are commoner in children than adults and have orable prognosis.