This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Intestinal obstruction, Subject name: Surgery
[{'content': 'What is the name of sign in this barium enema done in the patient of intussusception? \nSelect and explain. \nA. Meniscus sign, B. Pseudo kidney sign, C. Coiled spring sign, D. Target sign', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Radiological signsPlain x- ray* Meniscus sign* Target sign Barium enema* Claw sign* Coiled spring sign Ultrasound* Target sign (transverse scan)* Pseudo kidney sign (longitudinal scan)', 'role': 'assistant'}]