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
Small intestine in intestinal obstruction is distinguished radiologically from large intestine by – 
Select and explain. 
A. Haustration, B. Valvulae conniventes, C. Can not be distinguished, D. None
B: Valvulae conniventes
Answer: B: Valvulae conniventes 
Explanation: Valvulae conniventes are present in small intestine (particularly in jejunum) but not in large intestine.