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
Amount of I-131 given for carcinoma of thyroid is 
Select and explain. 
A. 30-100  mCi in low risk patients, B. 100-200 mCi in high risk patients, C. Both 1 and 2, D. 50 mCi
C: Both 1 and 2
Answer: C: Both 1 and 2 
Explanation: None