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
Intracellular calcification begins in? 
Select and explain. 
A. Cytoplasm, B. Mitochondria, C. Golgi bodies, D. Lysosomes
B: Mitochondria
Answer: B: Mitochondria 
Explanation: Mitochondria is the first organelle to get affected.