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': 'Latest retinoid drug used in acne is: March 2005 \nSelect and explain. \nA. Retinoic acid, B. Clindamycin, C. Adapalane, D. Azelaic acid', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. C: Adapalane Adapalene is an aromatic naphthoic acid derivative. Adapalene is stable in the presence of light and resistant to oxidation by benzoyl peroxide. Additionally, it differs from tretinoin/ retinoic acid in its affinity for various retinoic acid receptors. Moreover, adapalene is a very effective antiacne agent and shows low irritation potential, no sensitization, and no phototoxicity. Adapalene was approved for the topical treatment of acne in 1996', 'role': 'assistant'}]