This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Gallstone Disease, Subject name: Surgery
Mercedes Benz sign is seen in- 
Select and explain. 
A. Renal stone, B. Calcifiedlymphnode, C. Gall stone, D. Calcified fibroid
C: Gall stone
Answer: C: Gall stone 
Explanation: Ans. is 'c' i.e., Gall stone "The mercedes benz sign describes a star shaped pattern of gas fissuring with in gall stones described on an abdominal radiograph