This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General pathology, Subject name: Pathology
The following agents are known as leukemogens except 
Select and explain. 
A. Benzene, B. Berylium, C. Ethylene oxide, D. Ionizing radiation
B: Berylium
Answer: B: Berylium 
Explanation: Leukemogen-a substance capable of inducing leukemia. Causation, induction and development. Berrylium is not a leukemogen. Risk is related to total cumulative dose and does intensity.