This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: C.V.S., Subject name: Pediatrics
[{'content': 'A previously healthy child has sudden onset of red spots on body. There is a history of a preceding viral infection 1-4 weeks before the onset. \nSelect and explain. \nA. Dengue fever, B. Hemophilia A, C. Thrombotic thrombocytopenic purpura, D. Idiopathic thrombocytopenic purpura', 'role': 'user'}, {'content': 'Answer: D \nExplanation: d. Idiopathic thrombocytopenic purpuraAcute onset purpura and thrombocytopenia in a previously healthy child, with preceding history of viral infection is suggestive of ITP', 'role': 'assistant'}]