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
Commonest complication of Colles' fracture is: 
Select and explain. 
A. Nonunion, B. Malunion, C. Vascular injury, D. Sudeck's osteodystrophy
B: Malunion
Answer: B: Malunion 
Explanation: B i.e. Malunion