Leukemia is a name for several types of cancer that originate in the bone marrow and cause a large number of abnormal blood cells to form. Which blood cell is this?

Correct answer: (a) White blood corpuscles

Explanation

Leukaemia is cancer of the blood-forming tissue in the bone marrow, in which far too many abnormal white blood cells (WBCs) are made.

These immature cells crowd out normal blood cells and weaken the body's defences against infection.