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
Coffee bean sign is seen in – 
Select and explain. 
A. Intus sus c eption, B. Bowel ischaemia, C. Sigmoid volvulus, D. Congenital hypertrophic pyloric stenosis
C: Sigmoid volvulus
Answer: C: Sigmoid volvulus 
Explanation: Coffee bean sign is seen in sigmoid volvulus.