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: Pharmacology
Which of the following antibiotics is effective in treating oral candidiasis? 
Select and explain. 
A. Nystatin, B. Bacitracin, C. Penicillin, D. Tetracycline
A: Nystatin
Answer: A: Nystatin 
Explanation: None