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 pepper appearance is seen in intraorat periapical radiograph of: 
Select and explain. 
A. Thalassemia, B. Sjogren's syndrome, C. Periodontal abscess, D. Osteoporosis
A: Thalassemia
Answer: A: Thalassemia 
Explanation: None