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
Enzyme that play a key role in apoptosis is: 
Select and explain. 
A. Ribonuclease., B. DNAase., C. Caspase., D. Endonuclease.
C: Caspase.
Answer: C: Caspase. 
Explanation: None