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
MC cancer due to Radiation – 
Select and explain. 
A. Leukaemia, B. Bronchogenic Ca, C. Thyroid Ca, D. Breast cancer
A: Leukaemia
Answer: A: Leukaemia 
Explanation: Leukemia is the most common radiation induced cancer.