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: Surgery
[{'content': 'Which one of the following is not an intravesical chemotherapeutic agent- \nSelect and explain. \nA. Mitomycin C, B. BCG, C. Epirubicin, D. Thiotepa', 'role': 'user'}, {'content': 'Answer: B \nExplanation: BCG is an immunotherapeutic agent, not a chemotherapeutic one.', 'role': 'assistant'}]