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
Sideroblasts are seen in all except 
Select and explain. 
A. Thalassemia, B. Myelofibrosis, C. Alcoholism, D. Iron overload
A: Thalassemia
Answer: A: Thalassemia 
Explanation: Sideroblasts are erythroblasts with Prussian blue positive iron granules in their cytoplasm. They can be found in circulation in the following diseases: