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
Pulled elbow is 
Select and explain. 
A. A sprain of extensor tendons, B. Dislocation of head of radius, C. Fracture of lateral condyle of humerus, D. Dislocation of elbow
B: Dislocation of head of radius
Answer: B: Dislocation of head of radius 
Explanation: B i.e. Dislocation of head