A patient who demonstrates chronic gastrointestinal bleeding is diagnosed with anemia. What is the primary cause of the patient's anemia?
a. Vitamin B12 deficiency
b. Iron deficiency
c. Folate deficiency
d. Bone marrow failure
ANS: B
A continuous loss of blood is one of the most common causes of iron deficiency anemia (IDA). Gastrointestinal bleeding does not lead to vitamin B12 deficiency, folate deficiency, or bone marrow failure.
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