This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: JIPMER 2019, Subject name: Dental
[{'content': 'Erythematous ringworm like lesions parallel to the ribs, with hanging cuain sign and Christmas trees pattern is suggestive of: \nSelect and explain. \nA. Psoriasis, B. Pityriasis Rosea, C. Pityriasis rubra pilaris, D. Lichen planus', 'role': 'user'}, {'content': 'Answer: B \nExplanation: - Common in females- 1st patch called herald patch or mother patch develops.- Fir tree or Christmas tree appearance.- Scaling is present over periphery- Collarette of scale /cigarette paper like scale.- Free edges roll along the side- Hanging cuain sign.', 'role': 'assistant'}]