Pernicious Anemia is Caused By

Question

Pernicious anemia is caused by
A) severe hemorrhage
B) lack of vitamin B12
C) an insufficient amount of iron in the diet
D) radiation or chemical damage to bone marrow

Accepted Answer

Pernicious anemia is caused by a lack of vitamin B12, which is needed for red blood cell production. This can be due to a lack of intrinsic factor, a protein in the stomach needed for vitamin B12 absorption, or autoimmune destruction of the stomach lining.