This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Paranasal Sinuses, Subject name: ENT
[{'content': 'Ground glass appearance of maxillary sinus is seen in? \nSelect and explain. \nA. Maxillary Sinusitis, B. Maxillary Carcinoma, C. Maxillary polyp, D. Maxillary fibrous dysplasia', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. (d) Maxillary fibrous dysplasiaRef: Ballenger's Otorhinolaryngology: Head & Neck Surge: by James Byron Snow, Phillip A. Wackym, John Jacob Ballenge centennial ed p-506", 'role': 'assistant'}]