This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Skeletal system, Subject name: Radiology
[{'content': 'Multiple rain drop osteolytic lesions are seen in \nSelect and explain. \nA. Lead poisoning, B. Littere siwe disease, C. Intracranial lesion, D. Multiple fractures', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Multiple lytic lesions are seen in Acute disseminated langerhans cell histiocytosis (aka Letterer-Siwe disease)', 'role': 'assistant'}]