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
Ramu is a 60-year-old male with CA Descending colon presents with acute intestinal obstruction. In emergency department t/t of choice is - 
Select and explain. 
A. Defunctioning colostomy, B. Hartman's procedure, C. Total colectomy, D. Lt hemicolectomy
B: Hartman's procedure
Answer: B: Hartman's procedure 
Explanation: A variety of operations can be done in the obstructing lesion of left colon depending on a variety of factors, but Hartman's procedure is the most commonly preferred operation.