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: Unknown
[{'content': 'The following drug is indicated in the treatment of pityriasis versicolar: \nSelect and explain. \nA. Ketoconazole., B. Metronidazole., C. Griseofulvin., D. Chloroquine.', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e. Ketoconazole T/T of Pityriasis versicolor -New t/t (Antifungal)Old t/tTopical|MiconazoleClotrimazoleEconazoleShampoo| 1. KetoconazoleOral| 1. ItraconazoleWhitfield's ointment (3% salicylic acid and 6% Benzoic acid)Selenium disulfide shampooSodium thiosulphate solution", 'role': 'assistant'}]