This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Chemotherapy, Subject name: Pharmacology
[{'content': 'The antimicrobial agent which inhibits the ergosterol biosynthesis is \nSelect and explain. \nA. Ketaconazole, B. Amphotercin B, C. 5-flucytosine, D. Grisefulvin', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Refer KDT 6/e 761 Azoles act by inhibiting an enzyme, lanosterol -14-alpha -demethylase. This enzyme is involved in formation of ergosterol Amphotercin B acts6by binding to ergosterol and forming pores in fungal cell membrane', 'role': 'assistant'}]