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
[{'content': 'Not a radialogical sign of pneumoperitoneum \nSelect and explain. \nA. Visualization of falciform ligament, B. Football sign, C. Candy Cone appearance, D. Cupola sign', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Candy Cone appearance - Single or multiple dilated loops of bowel with three air fluid levels seen in small intestine obstruction.', 'role': 'assistant'}]