This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pharmacology
A 5-year-old child develops fever with rash on first day of fever. Rash disappears after few days and child develops ataxia. Most probable diagnosis? NOT RELATED-MEDICINE 
Select and explain. 
A. Measles, B. Fifth disease, C. Rocky mountain spotted fever, D. Chickenpox
D: Chickenpox
Answer: D: Chickenpox 
Explanation: .