This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Front of Thigh, Subject name: Anatomy
[{'content': 'Superficial inguinal ring is a defect in: \nSelect and explain. \nA. External oblique aponeurosis, B. Internal oblique aponeurosis, C. External oblique abdominis, D. Internal oblique abdominis', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans: A (External oblique aponeurosis) Ref: Grays Anatomy 40th EdExplanation:Inguinal canal extends from superficial inguinal ring to deep inguinal ringIt is 4 cm in lengthInguinal canal situated above inguinal ligament which extends from anterior superior illiac spine to pubic tubercleSuperficial inguinal ring is a triangular space in external oblique aponeurosis lies medial to inferior epigastric arteryDeep inguinal ring is a defect in fascia transversalis which lies lateral to inferior epigastric arteryHesselbaeh's Triangle:Medially-lateral border of rectus abdominis muscleLaterally-inferior epigastric arteryBase -inguinal ligamentHernias occuring through the hosselbach's triangle are known as Direct hernia.", 'role': 'assistant'}]