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: Medicine
All causes microcytic anemia except - 
Select and explain. 
A. Hookworm infestation, B. Thalassemia, C. Orotic aciduria, D. Pyridoxine deficiency
C: Orotic aciduria
Answer: C: Orotic aciduria 
Explanation: None