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
[{'content': 'Which viral association is found in pityriasis rosea : \nSelect and explain. \nA. HHV 7, B. CMV, C. Vericella Zoster, D. EBV', 'role': 'user'}, {'content': 'Answer: A \nExplanation: A. i.e. HHV-7', 'role': 'assistant'}]