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: Skin
Which viral association is found in pityriasis rosea : 
Select and explain. 
A. HHV 7, B. CMV, C. Vericella Zoster, D. EBV
A: HHV 7
Answer: A: HHV 7 
Explanation: A. i.e. HHV-7