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
Surgical treatment of Ulcerative colitisa) Done in late cases onlyb) Done in cases where medical treatment fails c) Pouch surgery doned) Restorative proctocolectomy done in emergency cases 
Select and explain. 
A. bc, B. c, C. ac, D. ad
A: bc
Answer: A: bc 
Explanation: None