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
[{'content': 'Most common benign tumor of paranasal sinuses? \nSelect and explain. \nA. Papilloma, B. Osteoma, C. Warts, D. Fibroma', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Osteoma * Osteoma of the frontal sinus - Most common benign tumour arising in the nasal sinuses.* The osteoma arises from the floor of the frontal sinus near the midline.", 'role': 'assistant'}]