This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General pathology, Subject name: Pathology
[{'content': 'Which of the following has a direct role in apoptosis? \nSelect and explain. \nA. Nitric oxide, B. Adenylcyclase, C. cAMP, D. Cytochrome C', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Mitochondria contain a protein called cytochrome c, which is its lifeline in intact mitochondria but releases this protein into the cytoplasm of the cell in apoptosis.Harshmohan textbook of pathology 7th edition.', 'role': 'assistant'}]