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: Radiology
Most common radiation induced cancer: 
Select and explain. 
A. Thyroid Carcinoma, B. Breast Carcinoma, C. Leukemia, D. Sarcomas
C: Leukemia
Answer: C: Leukemia 
Explanation: Leukemia is most common radiation induced cancer.
Others: Thyroid, Breast Carcinoma