This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous ENT, Subject name: ENT
Commonest site of Ivory osteoma is 
Select and explain. 
A. Frontal-Ethmodial region, B. Mandible, C. Maxilla, D. Spheroid
A: Frontal-Ethmodial region
Answer: A: Frontal-Ethmodial region 
Explanation: Osteoma: They are most commonly seen in the frontal sinus followed in turn by those of ethmoid and maxillary. They may remain asymptomatic, being discovered incidentally on X-rays. Ref: Textbook of ENT, Dhingra; 6th edition; Pg no: 205 ref img