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: Medicine
[{'content': '30-year old Basanti presents with light brown lesions involving both her cheeks. The lesions had never been erythematous. Which of the following is the most probable diagnosis: \nSelect and explain. \nA. SLE, B. Chloasma, C. Air borne contact dermatitis, D. Photo sensitive reaction', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Answer is B (Chloasma):', 'role': 'assistant'}]