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': "Multiple 'punched out holes' in skull are seen in: \nSelect and explain. \nA. Hyperparathyroidism, B. Multiple myeloma, C. Thalassemia major, D. Acromegaly", 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. Multiple myeloma', 'role': 'assistant'}]