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': 'What is injected in tuberculin Mantoux test? \nSelect and explain. \nA. Live attenuated Antigen abstract, B. Killed bacteria, C. Antigen abstract, D. Live bacteria in less concentration', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]