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: Radiology
[{'content': 'Small intestine in intestinal obstruction is distinguished radiologically from large intestine by – \nSelect and explain. \nA. Haustration, B. Valvulae conniventes, C. Can not be distinguished, D. None', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Valvulae conniventes are present in small intestine (particularly in jejunum) but not in large intestine.', 'role': 'assistant'}]