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: Dental
The following drug is effective in treatment of ptyriasis versicolor – 
Select and explain. 
A. Ketoconazole, B. Metronidazole, C. Griseofulvin, D. Chloroquine
A: Ketoconazole
Answer: A: Ketoconazole 
Explanation: Treatment of P. versicolor

Systemic → Ketoconazole, Fluconazole, Itraconazole.
Topical → Azoles (clotrimazole, econazole, micronazole, ketoconazole), selenium sulfide, sodium thiosulphate, whitfield's ointment (3% salicylic acid + 6% benzoic acid).