This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Fungal infections, Scabies, Pediculosis, Subject name: Dental
The following statement is true for Pityriasis rosea 
Select and explain. 
A. Life threatening infection, B. Self limiting, C. Caused by dermatophytes, D. Chronic relapsing
B: Self limiting
Answer: B: Self limiting 
Explanation: Pityriasis rosea (PR) is a self-limiting, generally benign disorder for which the prognosis is excellent and the recurrence rate is low (approximately 2%). Because it is not considered a transmissible disease, patients do not require isolation and may return to work or school Pityriasis rosea is a type of skin rash.Classically, it begins with a single red and slightly scaly area known as a "herald patch". This is then followed, days to weeks later, by a pink whole body rash.It typically lasts less than three months and goes away without treatment.Sometime a fever may occur before the sta of the rash or itchiness may be present, but often there are few other symptoms. Ref Harrison20th edition pg 2314