Which of the following erythrocyte indices is elevated in megaloblastic anemia?

A Mean Corpuscular Volume (MCV) ✓
B Mean Corpuscular Hemoglobin (MCH)
C Mean Corpuscular Hemoglobin Concentration (MCHC)
D Red Cell Distribution Width (RDW)

Explanation

Megaloblastic anemia is characterized by an elevation in Mean Corpuscular Volume (MCV), which indicates macrocytosis.

Source

Wintrobe's Clinical Hematology
Hematology Hematology: Anemia Hematology: Anemia Easy MEDICAL Confidence: high