This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Medicine
Endoscopy is useful for evaluation of these forms of gastrointestinal obstruction except 
Select and explain. 
A. Oesophagal, B. Gastroduodenal, C. Illeal, D. Colonic
C: Illeal
Answer: C: Illeal 
Explanation: Endoscopy is useful for evaluation and treatment of some forms of gastrointestinal obstruction. An impoant exception is a small-bowel obstruction due to surgical adhesions, which is generally not diagnosed or treated endoscopically. Oesophagal, gastroduodenal, and colonic obstruction or pseudo-obstruction can all be diagnosed and often managed endoscopically.Harrison 19e pg: 1891