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: Dental
[{'content': 'True about Pityriasis rosea is – \nSelect and explain. \nA. Self limiting, B. Chronic relapsing, C. Life threatening infection, D. Caused by dermatophytes', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Pityriasis rosea is thought to be a viral disease caused by HHV6/7, which is self limiting and subsides in 6-12 weeks.', 'role': 'assistant'}]