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
Treatment of 'Thimble bladder' is -a) Anti-tubercular treatment b) Corticosteroidsc) ileocystoplastyd) Anti-tubercular drugs + steroids 
Select and explain. 
A. a, B. bc, C. ac, D. b
C: ac
Answer: C: ac 
Explanation: None