This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bacteriology, Subject name: Microbiology
[{'content': 'Which of the following causes necrotising enterocolitis \nSelect and explain. \nA. Clostridium botulinum, B. Clostridium tetani, C. Clostridium perfingens A, D. Clostridium perfingens C', 'role': 'user'}, {'content': "Answer: D \nExplanation: Necrotizing enterocolitis is severe and often fatal enteritis. It is caused by C.perfringens type C strains with heat resistant spores that germinate in the intestine producing beta toxin, causing mucosal necrosis. Immunization with the type C toxoid has been shown to protect against this condition. Ref: Textbook of microbiology; Ananthanarayan and paniker's; 10th Edition; Pg: 260", 'role': 'assistant'}]