This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Fungal Infection, Subject name: Skin
[{'content': "'Pityriasis versicolor' is caused by: \nSelect and explain. \nA. Malassezia furfur, B. Trichophyton rubrum, C. Aspergillus fumigatus, D. Nocardia versicolor", 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. A. Malassezia furfurPitvriasis versicolora. Caused by Malassezia furfurb. Involves epidermisc. Most common site is upper part of the trunkd. Wood's light is useful for diagnosis", 'role': 'assistant'}]