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: Surgery
Minimum daily intake of iodide is: 
Select and explain. 
A. 20 microgram., B. 40 microgram., C. 60 microgram., D. 80 microgram.
A: 20 microgram.
Answer: A: 20 microgram. 
Explanation: None