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: Social & Preventive Medicine
[{'content': 'Aflatoxin is produced by? \nSelect and explain. \nA. Aspergillus niger, B. Aspergilus flavus, C. Candida albicans, D. Actinomycetes', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Aspergilus flavus", 'role': 'assistant'}]