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
Schick test is for - 
Select and explain. 
A. Susceptibility to diphteria, B. Susceptibility to tetanus, C. Susceptibility to scarlet fever, D. Susceptibility to RF
A: Susceptibility to diphteria
Answer: A: Susceptibility to diphteria 
Explanation: None