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
Coiled spring appearance on barium enema is seen in: 
Select and explain. 
A. Carcinoma colon, B. Sigmoid volvulus, C. Intussusception, D. Deal atresia
C: Intussusception
Answer: C: Intussusception 
Explanation: Ans. Intussusception