This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Abdominal wall ,Inguinal and Femoral region, Subject name: Anatomy
[{'content': 'A 2 year old found to have a degenerative malformation of the external oblique aponeurosis during development. Which of the following structures on the anterior abdominal walls is likely defective? \nSelect and explain. \nA. Superficial inguinal ring, B. Deep inguinal ring, C. Inguinal Ligament, D. Sac of a direct inguinal hernia', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Defect in external oblique aponeurosis - Superficial inguinal ring Defect in fascia transversalis - Deep inguinal ring', 'role': 'assistant'}]