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: Pharmacology
Lugol's Iodine contains: 
Select and explain. 
A. 5% iodine & 10% KI, B. 10% iodine & 20% KI, C. 10% iodine & 15% KI, D. 5% iodine & 15% KI
A: 5% iodine & 10% KI
Answer: A: 5% iodine & 10% KI 
Explanation: None