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: Surgery
[{'content': "Hernia is prevented by - \nSelect and explain. \nA. Scarpa's fascia, B. Transversalis fascia, C. External oblique, D. Lacunar ligament", 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]