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
Which is the best incision preferred for diaphragmatic surgery?(AIIMS May 2015, May 2014) 
Select and explain. 
A. Circumferential, B. Radial, C. Veical, D. Transverse
A: Circumferential
Answer: A: Circumferential 
Explanation: Ans: A. Circumferential(Ref Sahiston and Spencer's Surge, of Chest 8/chapter 7)Circumferential incision: generally taken for diaphragmatic surgery.Circumferential incisions:In periphery regions - Result in little loss of function.Must be at least 5 cm lateral to edge of central tendon.To avoid posterolateral & anterolateral branches of phrenic nerve.Difficult to correctly realign after long operation.Placement of surgical clips on each side of muscular incision greatly facilitates correct spatial orientation on closing.