This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Skin Cancer, Subject name: Skin
This classical presentation is of ? 
Select and explain. 
A. Pityriasis Rosea, B. P.alba, C. P.Rubra, D. P.Versicolor
A: Pityriasis Rosea
Answer: A: Pityriasis Rosea 
Explanation: Ans. (A) Pityriasis Roasea The Picture shows inverted Christmas tree appearance of lesions suggestive of diagnosis of Pityriasis Rosea. The essential clinical features are the following: * Discrete circular or oval lesions * Scaling on Most Lesions * Peripheral Collarette scaling with central clearance on at least two lesions.