This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anti-Cancer, Subject name: Pharmacology
Not an alkylating agent: 
Select and explain. 
A. Iphosphamide, B. Chlorambucil, C. Paclitaxel, D. Nitrosoureas
C: Paclitaxel
Answer: C: Paclitaxel 
Explanation: Ans) c (Paclitaxel) Ref: Katzung 11th editionAlkylating agents AltietamineDacarbazineBend amu stineLomu stineBusulfanMechlorethamineCarmustineMelphalanChlorambucilTemozolomideCyclophosphamide/ThiotepaIphosphamide This table is very important. Do remember it well!Cell Cycle-SpecificNonspecific(CCS) AgentsCell Cycle-(CCNS) AgentsAntimetabolitesAlkylating agentsCapecitabineCladribineCytarabineFludarabine5- Fluorouracil (5-FU) Gemcitabine6- Mercaptopurine (6-MP) Methotrexate (MTX)6-Thioguanine (6-TG)BusulfanCarmustineCyclophosphamideLomustineMechlorethamineMelphalanThiotepaAnthracyclinesDaunorubicinDoxorubicinEpirubicinIdarubicinMitoxantroneAntitumor antibioticBleomycinEpipodophyllotoxinsEtoposideTeniposideAntitumor antibioticsDactinomycinMitomycinTaxanesAlbumin-boundPaclitaxelDocetaxelPaclitaxelCamptothecinsIrinotecanTopotecanVinca alkaloidsVinblastineVincristineVinorelbinePlatinum analogsCarboplatinCisplatinOxaliplatin