This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pharmacology
[{'content': 'Anticancer drugs of plant origin is/are :  a) Vincristine b) Isotretinoin c) Bleomycin d) Methotrexate \nSelect and explain. \nA. ac, B. a, C. b, D. ab', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]