This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Radiology
[{'content': 'Salt and Pepper pot appearance of skull seen in: \nSelect and explain. \nA. Hyperparathyroidism, B. Multiple myeloma, C. Hypehyroidism, D. Pseudo hyperparathyroidism', 'role': 'user'}, {'content': 'Answer: A \nExplanation: * Pepperpot skull is occasionally used in place of salt and pepper skull to describe the typical radiographic appearance of multiple small radiolucent lesions of the skull vault. * In primary hyperparathyroidism, extensive resorption bone in the skull in combination with cystic areas of osteopenia are termed pepper pot skull. * Classically seen in hyperparathyroidism, and is occasionally used (inaccurately) to describe the raindrop skull of multiple myeloma REF : DAVID SUTTON 7 TH ED', 'role': 'assistant'}]