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
Barton’s fracture is 
Select and explain. 
A. Intra-articular fracture distal end radius with carpal bone subluxation, B. Fracture distal end humerus, C. Extra-articular fracture distal end radius, D. Intra-articular fracture distal end radius
A: Intra-articular fracture distal end radius with carpal bone subluxation
Answer: A: Intra-articular fracture distal end radius with carpal bone subluxation 
Explanation: Barton's fracture is an intraarticular fracture of the distal radius. 
Here fracture extends from the articular surface of the radius to either its anterior or posterior cortices. 
The small distal fragments get displaced and carry with it the carpals. (carpal bone subluxation) 2 types of volar Bartons fracture and dorsal Bartons fracture. 
Treatment: closed manipulation and plaster cast. when closed reduction fails, internal fixation with plate may be required.