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: Microbiology
[{'content': 'Gasterointestinal enteritis necroticans is caused by - \nSelect and explain. \nA. Clostridium difficale, B. Clostridium perfringens, C. Botulinum, D. C. Jejuni', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans is 'b' i.e. Cl. perfringens Necrotising enteritis (enteritis necroticans or Pigbel) is caused by Cl. perfringens.", 'role': 'assistant'}]