The Schilling Test Is Described as The

The Schilling test is described as the:

A) administration of radioactive cobalamin and the measurement of its excretion in the urine to test for vitamin B₁₂ deficiency.
B) measurement of antigen-antibody immune complexes in the blood to test for hemolytic anemia.
C) measurement of serum ferritin and total iron-binding capacity in the blood to test for iron deficiency anemia.
D) administration of folate and measurement in 2 hours of its level in a blood sample to test for folic acid deficiency anemia.