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': 'Nagglers reaction is used in the diagnosis of \nSelect and explain. \nA. Malaria, B. Whooping cough, C. Gas gangrene, D. Wool sorters disease', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]