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
Gunstock deformity is due to 
Select and explain. 
A. Fracture of 1st metacarpal bone, B. Fracture of lower end of radius, C. Supracondylar fracture of humerus, D. Lateral condylar fracture of humerus
C: Supracondylar fracture of humerus
Answer: C: Supracondylar fracture of humerus 
Explanation: C i.e. Supracondylar fracture humerus