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': 'The action of putrefactive bacteria on necrotic tissue results in \nSelect and explain. \nA. Infarction, B. Embolism, C. Gangrene, D. Coagulation', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Gangrene Gangrene is necrosis of tissue associated with superadded putrefication, most often following coagulative necrosis due to ischemia.', 'role': 'assistant'}]