This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Surgery
Male patient present to the hospital with abdominal pain and is incidentally detected with an abdominal aoic aneurysm what is the appropriate management ? 
Select and explain. 
A. immediately surgery, B. Monitor till size reaches 40mm, C. USG monitoring till size of the aneurysm reaches 70mm, D. Monitor till size reaches 55mm
D: Monitor till size reaches 55mm
Answer: D: Monitor till size reaches 55mm 
Explanation: 55mm is the critical diameter of our abdominal aoic aneurysm and surgery should be done even in asymptomatic patients at this level. ref : bailey and love 27th ed