<prompt> The antimicrobial agent which inhibits the ergosterol biosynthesis isKetaconazoleAmphotercin B5-flucytosineGrisefulvin  <response>: Refer KDT 6e 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 