Which of the following drugs is topoisomerase I inhibitor?
Camptothecin derivatives like topotecan and irinotecan act by inhibiting topoisomerase-I whereas Epipodophyllotoxins (etoposide and teniposide) and anthracyclines (doxorubicin, daunorubicin etc.) act by inhibiting topoisomerase-II.
Doxorubicin
Irinotecan
Etoposide
Vincristine