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
Level of iodisation in salt according to PFA at Consumer level : 
Select and explain. 
A. 10 ppm, B. 15 ppm, C. 30 ppm, D. 45 ppm
B: 15 ppm
Answer: B: 15 ppm 
Explanation: Production level - 30 ppm.
Consumer level - 15 ppm.