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
Ligation of cord in orchidectomy for treatment of testicular tumor is done at - 
Select and explain. 
A. External ring, B. Internal ring, C. Base of scrotum, D. Just above epididiymis
B: Internal ring
Answer: B: Internal ring 
Explanation: • The cord must be ligated as close as possible to the internal ring to facilitate complete removal of cord tissue in case a later retroperitoneal lymph node dissection is required.