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
Positive shick’s test indicates that person is : 
Select and explain. 
A. Immune to diphtheria, B. Hypersensitive to diptheria, C. Susceptible to diptheria, D. Carrier of diphtheria
C: Susceptible to diptheria
Answer: C: Susceptible to diptheria 
Explanation: Shick’s test

Intradermal test which provide information regarding :

a. Immune status, b. Hypersensitivity & susceptibility to diptheria toxin before giving active immunization.

 In one arm toxin is injected (test arm) and in other arm heat inactivated toxin is injected (control arm).