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: Unknown
[{'content': 'Most common causeof acute intestinal obstruction is : \nSelect and explain. \nA. Small bowel adhesions, B. Intussusception, C. Tuberculosis, D. Malignancy', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Intra-abdominal adhesions related to prior abdominal surgery account for upto 75% of the cases of small bowel obstruction. Intestinal Obstruction\nCauses\nIntraluminal (Eg. Foreign bodies, gallstones, or meconium)\nIntramural (Eg. Tumors, Crohn’s disease – associated inflammatory strictures)\nExtrinsic (Eg. Adhesions, hernias, or carcinomatosis)\nClinical Presentation :\nColicky abdominal pain, nausea, vomiting, abdominal distension and constipation are seen.\nConstipation is not seen in : Richter’s hernia obstruction, gall stone obstruction, mesenteric vascular occlusion.\nVomiting is a more prominent symptom with proximal obstructions than distal.', 'role': 'assistant'}]