This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Urology, Subject name: Surgery
[{'content': 'Which of the following is the most effective intravesical therapy for superficial bladder cancer \nSelect and explain. \nA. Mitomycin, B. Adriamycin, C. Thiotepa, D. BCG', 'role': 'user'}, {'content': "Answer: D \nExplanation: Bacillus Calmette-Guerin (BCG) is the main intravesical immunotherapy for treating superficial bladder cancer.BCG is put directly into the bladder through a catheter. The body's immune system cells are attracted to the bladder and activated by BCG, which in turn affects the bladder cancer cells. Treatment is usually staed a few weeks after a TURBT(trans urethral resection of bladder tumour) and is given once a week for 6 weeks at a dose of 120mg in 150ml of normal saline .Reference : page 1036 SRB's manual of surgery 5th edition", 'role': 'assistant'}]