This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pathology
Macropolycyte in peripheral smear is a feature 
Select and explain. 
A. Hereditary sherocytosis, B. Iron deficiency anaemia, C. Sickle cell anaemia, D. Megaloblastic anaemia
D: Megaloblastic anaemia
Answer: D: Megaloblastic anaemia 
Explanation: None