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': 'Howship-Romberg sign is associated with: \nSelect and explain. \nA. Splenic rupture, B. Obturator hernia, C. Diaphragmatic hernia, D. Carcinoma rectum', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Obturator hernia', 'role': 'assistant'}]