A 3yo child has a high temp for 4 days and he had not seen a doctor

A 3yo child has a high temp for 4 days and he had not seen a doctor . Then mother notices rashes
on buccal mucosa and some around the mouth. What is the most appropriate dx?

a. Measles
b. Roseola infectiosum
c. Rubella
d. Chicken pox
e. Impetigo

Ans. The key is B. Roseola infectiosum. It is a wrong key! The correct key should be A. Measles! [As the rash developed after 4 days fever the dx is measles!].