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': 'Metaphase arrest is caused by : a) Griseofulvin b) Vincristine c) Paclitaxel d) Colchicine e) Etoposide \nSelect and explain. \nA. bcd, B. abc, C. acde, D. bde', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]