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': 'Level of iodisation in salt according to PFA at Consumer level : \nSelect and explain. \nA. 10 ppm, B. 15 ppm, C. 30 ppm, D. 45 ppm', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Production level - 30 ppm.\nConsumer level - 15 ppm.', 'role': 'assistant'}]