This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Endocrine System, Subject name: Radiology
[{'content': 'Pepper pot appearance of skull is seen in- \nSelect and explain. \nA. Multiple myeloma, B. Hyperparathyroidism, C. Sickle cell anemia, D. Fibrous dysplasia', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Hyperparathyroidism Salt and pepper skull/ pepperpot skull* Multiple tiny well-defined lucencies in the skull vault caused by resorption of trabecular bone* There is a loss of definition between the inner and outer tables of the skull and a groundglass appearance as well as spotty deossification* Seen in hyperparathyroidismImportant radiological appearance of skulli) Lacunar skull - Arnold chiari malformationii) Geographic skull - Eosinophilic granulomaiii) Cotton wool skull - Paget's diseaseiv) 'Salt-pepper' skull - Hyperparathyroidismv) Groundglass skull - Fibrous dysplasiavi) Punched out/Raindrop lesion of skull - Multiple myelomavii) Ping-Pong skull - Fracture skull in children", 'role': 'assistant'}]