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
What is injected in tuberculin Mantoux test? 
Select and explain. 
A. Live attenuated Antigen abstract, B. Killed bacteria, C. Antigen abstract, D. Live bacteria in less concentration
C: Antigen abstract
Answer: C: Antigen abstract 
Explanation: None