This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nose and PNS, Subject name: ENT
Largest sinus: 
Select and explain. 
A. Frontal sinus, B. Maxillary sinus, C. Ethmoidal sinus, D. Aphenoid sinus
B: Maxillary sinus
Answer: B: Maxillary sinus 
Explanation: Ans. (b) Maxillary sinusRef: Dhingra 5th Ed. / 203-204Maxillary sinus is largest sinus with volume of around 15 cc.