This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Fracture Management, Subject name: Orthopaedics
Internal Fixation is primarily used in all except: 
Select and explain. 
A. Compound fractures, B. Multiple fractures, C. Fractures in elderly patient, D. Fracture neck of femur
A: Compound fractures
Answer: A: Compound fractures 
Explanation: Usual treatment for open fractures is debridement (more impoant) and external fixator. Compound fractures treatment depend upon wound size and time duration since injury.Usually compound fractures fall into category >=III A Type and Method of fixation: Grade I Debridement and internal fixation by intramedullary nail and plate. Grades II, IIIA Within 6 hours of injury same as Grade I. After 6 hours same as grades IIIB and IIIc. Grades III B, III C Debridement and external fixation