This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anti Thyroid, Subject name: Pharmacology
[{'content': "Lugol's Iodine contains? \nSelect and explain. \nA. 5 % iodine & 10 % KI, B. 10 % iodine & 20 % KI, C. 10 % iodine & 15 % KI, D. 5 % iodine & 15 % KI", 'role': 'user'}, {'content': 'Answer: A \nExplanation: ANSWER: (A) 5 % iodine 8t 10 % KIREF: KDT 6th edition page 252, http://en.wkipedia.org/TAriki/Lugol%27s_iodine"LugoTs iodine, also known as Lugol\'s solution, first made in 1829, is a solution of elemental iodine and potassium iodide in water, named after the French physician J.G.A. Lugol. The 5% solution consists of 5% (wt/v) iodine (I2) and 10% (wt/v) potassium iodide (KI) mixed in distilled water and has a total iodine content of 130 mg/mL"', 'role': 'assistant'}]