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
Roseola infantum is caused by ______ 
Select and explain. 
A. HHV 5, B. HHV 6, C. Rubella, D. Rubeola
B: HHV 6
Answer: B: HHV 6 
Explanation: Roseola infantum / Exanthem subitum / Sixth disease is caused by HHV 6 or 7.