Which of the following is NOT a nutritional anemia?

Microblastic anemia is characterized by the presence of abnormally large red blood cells, often resulting from a deficiency in vitamin B12 or folate. It is directly related to nutritional deficiencies, which is why it qualifies as a form of nutritional anemia.

On the other hand, iron deficiency anemia arises from a lack of iron in the body, which is essential for hemoglobin production, while pernicious anemia is specifically linked to the inability to absorb vitamin B12, often due to intrinsic factor deficiency. Anemia of chronic disease is a type of anemia associated with ongoing inflammatory or chronic conditions but does not fall specifically under the nutritional deficiency category as it is more about the body's response to illness rather than a direct lack of a nutrient.

Therefore, while microblastic anemia involves nutritional factors, it is not classified as nutritional anemia when compared to the other options, as it encompasses broader causes.