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
True about treatment of carcinoma left colon with acute obstruction 
Select and explain. 
A. Haman's procedure, B. Left colectomy with anastomosis, C. Proximal colostomy, D. All
D: All
Answer: D: All 
Explanation: Ans. is ' a ' , ' b ' , ' c '