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: Dental
Whiff test is done for: 
Select and explain. 
A. Vaginal candidiasis, B. Trichomoniasis, C. Bacterial vaginosis, D. Syphilis
C: Bacterial vaginosis
Answer: C: Bacterial vaginosis 
Explanation: Whiff test is done to diagnose Bacterial vaginosis, where "Fishy amine odor" is seen after adding KOH to the discharge sample.