This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Impoant Viral Diseases in Children, Subject name: Pediatrics
[{'content': 'A child presents with history of high fever for 4 days along with seizures. A rash develops on trunk on the day after the fever subsides. What is the most probable diagnosis? \nSelect and explain. \nA. Roseola infantum, B. Measles, C. Rubella, D. Varicella', 'role': 'user'}, {'content': 'Answer: A \nExplanation: History of high fever & rash appearing as the fever subsides is suggestive of Roseola infantum. -Roseola infantum/sixth disease/exanthema subitum * Caused by herpes virus (HHV6A and 6B) * Clinical features: Sudden onset of high fever Rash appear when the fever subsides Nagayama spots are seen * Lab findings in Roseola infantum Relative Lymphocytosis Leukopenia', 'role': 'assistant'}]