This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Blood, Subject name: Pathology
Ring sideroblasts, with iron laden occurs in 
Select and explain. 
A. Endoplasmic reticulum, B. Nucleus, C. Mitochondria, D. Nuclear membrane
C: Mitochondria
Answer: C: Mitochondria 
Explanation: i.e. (Mitochondria) : (301-Harsh Mohan 6th ) (625-Robbins & Cotran-Pathologic basis of disease 8th)Ringed sideroblasts is characteristic of sideroblastic anemia /Myelodysplastic SyndromeRinged sideroblast in which haem synthesis is disturbed as occurs in sideroblastic anaemiasRinged sideroblasts containing numerous large granules, often forming a complete or partial ring around the nucleus. These ringed arrangement of these granules is due to presence of iron laden mitochondria around the nucleus