This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Management In Orthopedics, Subject name: Orthopaedics
K nail work on the pricliple of - 
Select and explain. 
A. One point fixation, B. Two point fixation, C. Three point fixation, D. Four point fixation
C: Three point fixation
Answer: C: Three point fixation 
Explanation: Ans. is 'c' i.e., Three point fixation * K-nail is used for transverse or short oblique fracture of femur, especially in isthemic area.* K-nail (Kuntscher cloverleaf intramedullary nail) provides three points fixation due to elastic deformation.* These three points of fixation are both ends of bone (2 points) and isthmus (3rd point).