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
Investigation for small intestine includes all except: 
Select and explain. 
A. Enteroclysis, B. Radionucleide scan, C. CT enteroclysis, D. USG enteroclysis
D: USG enteroclysis
Answer: D: USG enteroclysis 
Explanation: D i.e. USG enteroclysis