This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Shoulder and arm injuries, Subject name: Orthopaedics
A 27-year-old right hand dominant man sustains a right distal radius fracture after a fall. He is treated with closed reduction. Which radiographic parameter has the greatest bearing on functional outcome 
Select and explain. 
A. Radial height, B. Radial inclination, C. Palmar tilt, D. Ulnar variance
C: Palmar tilt
Answer: C: Palmar tilt 
Explanation: Although radial height, radial inclination, and ulnar variance are impoant reduction parameters for the successful nonoperative treatment of distal radius fractures, palmar tilt has been shown to have the greatest bearing on long-term functional outcomes.