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
Which of the following has direct role in apoptosis? 
Select and explain. 
A. CAMP, B. CGMP, C. Cytochrome C, D. Exonuclease
C: Cytochrome C
Answer: C: Cytochrome C 
Explanation: Cytoplasmic cytochrome C has a significant role in intrinsic pathway for apoptosis.