This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anti-Neoplastic Agents, Subject name: Pharmacology
[{'content': 'Which of the following anticancer drugs is not derived from plants? \nSelect and explain. \nA. Irinotecan, B. Doxorubicin, C. Paclitaxel, D. Etoposide', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Doxorubicino Antitumor antibiotics includes anthracvcline antibiotics (doxorubicin also known as adriamycin, daunorubicin, epirubicin and idarubicin), mitoxantrone, bleomycin, dactinomycin and mitomyin. All antitumor antibiotics are obtained from Streptomyces.DrugSourceCamptothecins (Irinotecan and Topotecan)Camptotheca acuminate treePaclitaxelBark of Western yew treeEtoposidePodophyllotoxin, a plant glycosideAnitumor antibioticsStreptomyces", 'role': 'assistant'}]