This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Haematology, Subject name: Pathology
Ringed Sideroblasts are seen in- 
Select and explain. 
A. Iron deficiency anemia, B. Myelodysplastic syndrone, C. Thalassemia, D. Anemia of chronic disease
B: Myelodysplastic syndrone
Answer: B: Myelodysplastic syndrone 
Explanation: In MDS ( myelodysplastic syndrome),within the erythroid series , common abnormalities include ring sideroblasts ,erythroblasts with iron laden mitochondria visible as perinuclear granules surrounding 1/3 rd of the nucleus in prussian blue stained aspirates or biopsies. Ref: Robbins and Cotrans Pathologic basis of disease;pg :615 under morphology.