AKT question relating to child with a fever and rash

You see a 5-year-old boy with a sore throat and a headache. He has developed a fever and a rash all over his body.

On examination, you find the following:

Science Photo Library.

What is the MOST likely diagnosis? Select ONE option only.

Measles

Parvovirus B19 infection

Roseola infantum

Rubella

Scarlet fever

Answer DOI 10.1177/17557380211005669a