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': "Carman's meniscus sign is diagnostic of – \nSelect and explain. \nA. Peptic ulcer, B. Cholecystitis, C. Carcinoma of stomach, D. Meconium ileus", 'role': 'user'}, {'content': "Answer: C \nExplanation: Hampton's line \xa0 \xa0 \xa0 \xa0 \xa0 \xa0 \xa0 → Pathognomonic of benign gastric ulcer\nCarman's meniscus sign → Diagnostic of malignant gastric ulcer (Carcinoma of stomach)", 'role': 'assistant'}]