This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Intestinal obstruction, Subject name: Surgery
[{'content': 'Most common cause of colonic obstruction is: \nSelect and explain. \nA. Volvulus, B. Hernia, C. Adhesions, D. Neoplasm', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Most common cause of colonic obstruction is Neoplasm. MC cause of small bowel obstruction is adhesions.', 'role': 'assistant'}]