What is the term for the anemia characterized by a deficiency in vitamin B12, which leads to the production of abnormally large red blood cells?

A Iron-deficiency anemia
B Megaloblastic anemia ✓
C Sickle cell anemia
D Thalassemia

Explanation

Megaloblastic anemia is a condition where the bone marrow produces large, immature red blood cells due to a lack of vitamin B12 or folate.

Source

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