What is the term for the anemia characterized by a deficiency in intrinsic factor, leading to impaired vitamin B12 absorption?

A Pernicious anemia ✓
B Iron deficiency anemia
C Folate deficiency anemia
D Sideroblastic anemia

Explanation

Pernicious anemia is caused by a lack of intrinsic factor, which is necessary for vitamin B12 absorption, leading to a specific type of megaloblastic anemia.

Source

Harrison's Principles of Internal Medicine
Hematology Hematology: Anemia Hematology: Anemia Medium MEDICAL Confidence: high