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: Unknown
Radiation is most commonly associated with which of following cancer? 
Select and explain. 
A. Leukemia, B. Lymphoma, C. Lung carcinoma, D. Osteoblastoma
A: Leukemia
Answer: A: Leukemia 
Explanation: Ans is 'a' i.e. Leukemia o Leukemia is the most common radiation-induced cancer. All leukemias, except CLL, can be caused by radiationso Other tumors caused by radiation exposure are thyroid carcinoma (especially papillary carcinoma), breast cancer and skin cancers (squamous cell and melanoma).