This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Hypo Pigmentary Disorders, Subject name: Dental
[{'content': 'Which topical agent is antiproliferative, cytotoxic to melanocytes and a weak competitive inhibitor of tyrosinase? \nSelect and explain. \nA. Kojic acid, B. Hydroquinone, C. Retinoids, D. Azelaic acid', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Azelaic acid - Tyrosinase inhibitor Has anti-inflammatory propeies and antiproliferative effect on keratinocytes - used in acne Has cytotoxic action against Melanocytes - used in Hyperpigmentary disorders Tyrosinase inhibitors - used for hyperpigmented disorders like melasma Eg -1. Hydroquinone2. Azelaic acid 3. Kojic acid4. Arbutin', 'role': 'assistant'}]