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
[{'content': 'Ladder pattern of DNA electrophoresis in apoptosis is caused by the action of: \nSelect and explain. \nA. Endonuclease, B. Transglutaminase, C. DNAse, D. Caspase', 'role': 'user'}, {'content': 'Answer: A \nExplanation: . Endonuclease', 'role': 'assistant'}]