This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pathology
Ladder pattern of DNA electrophoresis in apoptosis is caused by the action of following enzyme 
Select and explain. 
A. Endonuclease, B. Transglutaminase, C. DNAse, D. Caspase
A: Endonuclease
Answer: A: Endonuclease 
Explanation: .