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
'Fir-tree' type of distribution is seen in? 
Select and explain. 
A. Pityriasis Rosea, B. Psoriasis, C. Measles, D. Secondary syhilis
A: Pityriasis Rosea
Answer: A: Pityriasis Rosea 
Explanation: A. i.e. Pityriasis rosea