This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Amputations and Spos Injury, Subject name: Orthopaedics
Which of the following is not an indication of secondary nerve repair: 
Select and explain. 
A. Syndrome of irritation, B. Division of nerve by sharp object, C. Delayed presentation of nerve injury, D. Syndrome of incomplete interruption
B: Division of nerve by sharp object
Answer: B: Division of nerve by sharp object 
Explanation: Late repair/ Secondary repair( Repair weeks or months after the injury) , may be indicated because: (1)Closed injury was left alone but no sign of recovery is seen at the expected time; (Syndrome of incomplete interruption) (2)Diagnosis was missed and the patient presents late ( Delayed presentation) (3)Failed primary repair If there are signs of nerve irritation, secondary exploration is recommended( Syndrome of irritation) =Division of nerve by sharp object is managed by primary repair.