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': 'Pityriasis rosea true \nSelect and explain. \nA. Self limiting, B. Chronic relapsing, C. Life threatening infection (autoimmune disease), D. Caused by dermatophytes', 'role': 'user'}, {'content': 'Answer: A \nExplanation: A i.e. Self resolving', 'role': 'assistant'}]