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 5-year-old child develops fever with rash on the first day of fever. Rash disappears after few days & the child develops ataxia. Most probable diagnosis is: \nSelect and explain. \nA. Measles, B. Fifth disease, C. Chicken pox, D. Rocky mountain spotted fever', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Rash appearing on 1st day of fever suggests Chickenpox Ataxia can occur as a complication of varicella infection.', 'role': 'assistant'}]