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
Winch of the following organelles plays a pivotal role in apoptosis? 
Select and explain. 
A. Mitochondria, B. Endoplasmic reticulum, C. Nucleus, D. Golgi apparatus
A: Mitochondria
Answer: A: Mitochondria 
Explanation: Ans. (a) Mitochondria(Ref Essential of apoptosis 2003:245)Mitochondria is the most important organelle involved in apoptosis initiation and regulation.