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
Treatment of Non-union of shaft femur 
Select and explain. 
A. Open reduction with external fixation, B. Excision of the bone, C. Bone grafting with internal fixation with K-Nail, D. All of the following
C: Bone grafting with internal fixation with K-Nail
Answer: C: Bone grafting with internal fixation with K-Nail 
Explanation: C i.e. Bone grafting with internal fixation with K-Nail