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: Orthopaedics
Treatment of choice for non-united fracture of lower 1/4th tibia with multiple discharging sinuses & various puckered scar with 4 cm shortening of leg - 
Select and explain. 
A. Plating, B. External fixator, C. Ilizarov's fixator, D. Intramedullary nail
C: Ilizarov's fixator
Answer: C: Ilizarov's fixator 
Explanation: Patient in question has infected non-union (multiple discharging sinuses & various pukered scar) with shortening of 4 cms. Ilizanov fixation with distraction osteogenesis will be the best option.