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: Radiology
[{'content': 'Salt and pepper effect in IOPA is seen in: \nSelect and explain. \nA. Sjogren syndrome, B. Thalassemia, C. Sickle cell anemia, D. Condensing osteitis', 'role': 'user'}, {'content': "Answer: B \nExplanation: Intraoral radiographs in some cases reveal a peculiar trabecular pattern of the maxilla and mandible, characterized by an apparent coarsening of some trabeculae and the blurring and disappearance of others, resulting in a salt and pepper effect. In general, thinning of the lamina dura and circular radiolucencies in the alveolar bone are also found.\nShafer's Oral pathology, 7th ed, pg 768", 'role': 'assistant'}]