This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anatomy, Subject name: Anatomy
Intra cellular calcification begins in which of the following organelles 
Select and explain. 
A. Mitochondria, B. Golgi body, C. Lysosomes, D. Endoplasmic reticulum
A: Mitochondria
Answer: A: Mitochondria 
Explanation: Ref : Robbins 9/e p65-66 Initiation of intracellular calcification occurs in the mitochondria of dead or dying cells that accumilate calicium