This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Superficial Mycoses, Subject name: Skin
Ptyriasis versicolor is caused by? 
Select and explain. 
A. Malassezia furfur, B. T. Rubrum, C. E. flocculosum, D. Candidiasis
A: Malassezia furfur
Answer: A: Malassezia furfur 
Explanation: ANSWER: (A) Malassezia furfurREF: ROXBURGH'S Common Skin Diseases 17th edition page 299Tinea versicolor:Caused by Malassezia furfur (pityrosporum ovale)Presents multiple, small, hypo pigmented macules over chest and back of young adultsPerifollicular macules to begin with and then merge together.Diagnosis10% KOH mount - short and round hyphae (spaghetti and meat ball appearance)Green fluorescence on wood's lamp* Treatment:Ketoconazole/Itraconazole/ for systemic treatment and Miconazole/ clotrimazole for local application.Griesofulvin is not effective