This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anatomy of Bone & Fracture Healing, Subject name: Orthopaedics
[{'content': 'Common causes of vertebra plana \nSelect and explain. \nA. TB, B. Eosinophilic granuloma, C. Metastasis, D. All of the above', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is 'd' i.e., All of the above Vertebra planao This term is used to describe uniform collapse of a vertebral body into a thin, flat disc. The most common cause is eosinophilic granuloma, with the thoracic vertebrae most frequently affected. Causes areHistocytosis - X (Eosinophilic granuloma)LeukemiaTBMetastasis, Multiple myeloma, Ewing ys sarcoma, lymphomaOsteochondritis of vertebral body (Calve's disease)HemangiomaTraumaSteroids", 'role': 'assistant'}]