This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Testis and scrotum, Subject name: Surgery
[{'content': 'In varicocele surgery, venous drainage is done by: \nSelect and explain. \nA. IVC, B. Aoa, C. Superior epigastric vein, D. Cremasteric vein', 'role': 'user'}, {'content': "Answer: D \nExplanation: Treatment* High inguinal ligation (near deep ring) of pampiniform plexus of veins* Microvascular sub inguinal ligation (best results)* Palomo's operation: ligation of Left Gonadal Vein in retroperitoneum * Alternative venous drainage cremasteric veins", 'role': 'assistant'}]