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: Skin
[{'content': 'Depigmenting agent of choice in in treatment of dermatological disorders is \nSelect and explain. \nA. Hydroquinone, B. Zinc, C. Kojic acid, D. Azelaic acid', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Hydroquinone Skin depigmenting agents in clinical use are Hydroquinone - most effective and widely used Kojic acid Kojicdipalmitate Azelaic acid", 'role': 'assistant'}]