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
[{'content': 'A most common cause of intestinal obstruction is? \nSelect and explain. \nA. Ileocaecal tuberculosis, B. Carcinoma colon, C. Intussusception, D. Adhesions', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Adhesions and bands are the commonest causes of intestinal obstruction in Western countries. In India, hernia and then adhesions are the two common causes\xa0of intestinal obstruction. Clinical features\n\nPain abdomen—colicky type and recurrent and episodic\nDistension, vomiting\nConstipation\nReduced bowel sounds on auscultation\nPrevious surgical scars commonly observed\nDehydration, tachycardia, hypotension.', 'role': 'assistant'}]