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: Orthopaedics
[{'content': 'Lytle bevelled lesions are seen in skull X-ray, the most likely cause is - \nSelect and explain. \nA. Multiple myeloma, B. Eosinophilic granuloma, C. Metastasis, D. Osteosarcoma', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Some guides have given multiple myeloma as the answer. However, the correct answer is eosinophilic granuloma.\nPunched out lesions of the skull are seen both in Eosinophilic granuloma and multiple myeloma. However, bevelled edges (double contour) is characteristic of eosinophilic granuloma due to uneven destruction of the inner and outer table of the skull.\nPunched out lesions of skull\xa0→\xa0Multiple myeloma\nPunched out lesions with bevelled edges → Eosinophilic granuloma', 'role': 'assistant'}]