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 begin in the- 
Select and explain. 
A. Mitochondria, B. Endoplasmic reticulum, C. Golgi bodies, D. Intracellular vocuoles
A: Mitochondria
Answer: A: Mitochondria 
Explanation: Ans. is 'a' i.e., Mitochondria