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: Pharmacology
[{'content': 'PUVA therapy is used in : \nSelect and explain. \nA. Psoriasis, B. Lichen planus, C. Freckles, D. Melasma', 'role': 'user'}, {'content': 'Answer: A \nExplanation: FDA approved indications of PUVA are vitiligo and psoriasis.', 'role': 'assistant'}]