This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nose and paranasal sinuses, Subject name: ENT
[{'content': 'The most common site of osteoma is \nSelect and explain. \nA. Maxillary sinus, B. Ethmoidal sinus, C. Frontal sinus, D. Sphenoidal sinus', 'role': 'user'}, {'content': 'Answer: C \nExplanation: The commonest site of osteoma in the PNS is frontal sinus.Commonest benign tumor of PNS is an osteomaMost common benign tumor of the nose is capillary hemangioma (nasal septum)Gardner`s syndrome- Colonic polyposis, multiple soft tissue swellings, and facial osteomas(Autosomal Dominant hereditary defect of connective tissue)Ref: Hazarika; 3rd ed; Pg 370', 'role': 'assistant'}]