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
The antimicrobial agent which inhibits the ergosterol biosynthesis is : 
Select and explain. 
A. Ketoconazole, B. Amphotericin B, C. 5-Flucytosine, D. Griseofulvin
A: Ketoconazole
Answer: A: Ketoconazole 
Explanation: None