This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous (E.N.T.), Subject name: ENT
[{'content': 'Features of periostitis on X-ray hip of a child suggests \nSelect and explain. \nA. Syphilis, B. Rubella, C. Toxoplasma, D. CMV', 'role': 'user'}, {'content': 'Answer: A \nExplanation: (A) Syphilis', 'role': 'assistant'}]