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: Unknown
[{'content': 'Hanging curtain sign seen in ? \nSelect and explain. \nA. Pityriasis rosea, B. Pityriasis Versicolor, C. Psoriasis, D. Pityriasis Alba', 'role': 'user'}, {'content': 'Answer: A \nExplanation: ANSWER: (A) Pityriasis roseaREF: Dermatology. 1995: 190(3):252. PubMed PMID: 7599393, Clinical Pediatric Dermatology - By Thappa Page 104Repeat Dermatology June 2010', 'role': 'assistant'}]