About vinca alkaloids true is ?: (A) Inhibits mitotic spindle, (B) Enhances polymerization of tubulin, (C) Inhibits topoisomerase I, (D) Inhibits topoisomerase II
Answer is A. Ans. is 'a' i.e., Inhibits mitotic spindle Vinca alkaloids (vincristine) inhibit mitotic spindles by preventing polymerization of tubulin