This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Gastrointestinal Radiology, Subject name: Radiology
[{'content': 'Hour glass deformity of stomach is seen in which of the following condition: \nSelect and explain. \nA. Benign ulcer, B. Malignant ulcer, C. Gastric stricture, D. Achalasia cardia', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Gastric Stricture: A condition in which there is a central constriction of the wall of the stomach dividing it into two cavities, cardiac and pyloric.', 'role': 'assistant'}]