This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Radiotherapy, Subject name: Radiology
Most common cancer worldwide is 
Select and explain. 
A. Breast cancer, B. Lung cancer, C. Cervical cancer, D. Leukemia
B: Lung cancer
Answer: B: Lung cancer 
Explanation: Lung cancer is the most common cancer and the most common cause of cancer death in the world.Reference: Harrison; 19th edition