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
In apoptosis which is/are involved - 
Select and explain. 
A. Apaf-1, B. Bc12, C. Caspases, D. All
D: All
Answer: D: All 
Explanation: Ans. is 'a' i.e., Apaf-1; 'b' i.e., BCl2; 'c' i.e., Caspases