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
Which of the following is the most effective intravesical
therapy for superficial bladder cancer 
Select and explain. 
A. Epirubicin, B. Mitomycin C, C. Thiotepa, D. BCG
D: BCG
Answer: D: BCG 
Explanation: Intravesical chemotherapeutic agents are

Mitomycin C
BCG ( best)
Thiopeta

Epirubicin