This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Small & Large Intestine, Subject name: Surgery
X-ray below demonstrates 
Select and explain. 
A. Small bowel obstruction, B. Sigmoid volvulus, C. Large bowel obstruction, D. Perforation
A: Small bowel obstruction
Answer: A: Small bowel obstruction 
Explanation: Ans. (a) Small Bowel Obstruction* Multiple air fluid levels seen here is due to small bowel obstruction.* This appearance is known as Step ladder appearance