This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Cellular Pathology, Subject name: Pathology
True about metastatic calcification: 
Select and explain. 
A. Serum ca level is normal, B. Occurs in dead/dying tissue, C. Occurs in damaged heart valves, D. Calcification starts in mitochondria
D: Calcification starts in mitochondria
Answer: D: Calcification starts in mitochondria 
Explanation: Ans. (d) Calcification starts in mitochonda(Ref: Robbins 9th/pg 65)Calcification begins in mitochondria QThe prime abnormality is due to pathological entry of large amount of calcium into organelle especially mitochondria