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
Erythematous ringworm like lesions parallel to the ribs, with hanging cuain sign and Christmas trees pattern is suggestive of: 
Select and explain. 
A. Psoriasis, B. Pityriasis Rosea, C. Pityriasis rubra pilaris, D. Lichen planus
B: Pityriasis Rosea
Answer: B: Pityriasis Rosea 
Explanation: - 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.