Answer the following question given this paragraph: 

Leukemia is a type of cancer in which bone marrow produces abnormal white blood cells. The abnormal cells can’t do their job of fighting infections. Like most cancers, leukemia is thought to be caused by a combination of genetic and environmental factors. It is the most common cancer in children.


Q: What is the type of cancer where bone marrow produces abnormal white blood cells?


A:
leukemia