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
[{'content': 'The MOST common site of Osteomas amongst the paranasal sinuses is? \nSelect and explain. \nA. Maxillary, B. Frontal, C. Ethmoidal, D. Sphenoidal', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Osteoma is the most common benign tumor of the paranasal sinuses. The frontal sinus is the most common site of osteoma formation. It is associated with Gardner syndrome when multiple facial osteomas are found.', 'role': 'assistant'}]