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': 'A lady develops pigmentation on the bridge of nose and cheeks on exposure to sunlight. The most likely diagnosis is \nSelect and explain. \nA. Chloasma, B. Systemic lupus erythematosus, C. Photodermatitis, D. Rosacea', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. a. Chloasma', 'role': 'assistant'}]