Question

what is the gold standard test for iron deficiency anemia?
schilling test
bone marrow aspiration
methylmalonic acid
hypersegmented neutrophil test

Explanation:

The Schilling test is for vitamin B12 - deficiency. Methylmalonic acid is a marker, not a gold - standard test. Hypersegmented neutrophil test is related to vitamin B12 or folate deficiency. Bone marrow aspiration can directly assess iron stores in the body and is the gold - standard test for iron - deficiency anemia as it can show the presence or absence of iron - containing macrophages.

Answer:

B. Bone marrow aspiration