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: Pathology
Trismus is due to infection by 
Select and explain. 
A. Staphylococci, B. Streptococci, C. Diphtheria, D. Clostridium Tetani
D: Clostridium Tetani
Answer: D: Clostridium Tetani 
Explanation: None