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
Preservation of illioinguinal nerve is an impoant step in inguinal hernia operation while - 
Select and explain. 
A. Incising the sub-cutaneous tissue, B. Incising the extra oblique aponeurosis, C. Incising the cremasteric fascia, D. Isolating the sac
B: Incising the extra oblique aponeurosis
Answer: B: Incising the extra oblique aponeurosis 
Explanation: Ans. is 'b' i.e., Incising the extra oblique aponeurosis