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': 'Complement necessary for neisseria infection is/ are - \nSelect and explain. \nA. C5, B. C6, C. C7, D. All', 'role': 'user'}, {'content': "Answer: D \nExplanation: Ans. is All 'a' i.e., C 5; 'b' i.e., C 6; 'c' i.e., C 7", 'role': 'assistant'}]