This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pediatrics
True about measles – 
Select and explain. 
A. Koplik spot appears in prodromal stage, B. Fever stops after onset of rash, C. Vaccine given at 9 month, D. All the above
D: All the above
Answer: D: All the above 
Explanation: Measles vaccine is given at the age of 9 months of age.