This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Iron deficiency anemia, Subject name: Pathology
The peripheral blood smear of an anemic 1-year-old child is shown in the illustration. The most likely diagnosis is 
Select and explain. 
A. anemia of chronic disease., B. aplastic anemia., C. hereditary spherocytosis, D. iron deficiency anemia.
D: iron deficiency anemia.
Answer: D: iron deficiency anemia. 
Explanation: - Given illustration shows hypochromia and microcytosis along with anisopoikilocytosis - suggests the diagnosis of Iron deficiency anemia. - Iron deficiency anemia is the most common cause of hypochromic microcytic anemia.