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
Salt and pepper effect in IOPA is seen in: 
Select and explain. 
A. Sjogren syndrome, B. Thalassemia, C. Sickle cell anemia, D. Condensing osteitis
B: Thalassemia
Answer: B: Thalassemia 
Explanation: 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.
Shafer's Oral pathology, 7th ed, pg 768