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
A 18 years old boy with history of Anterior dislocation of shoulder presents with 
Select and explain. 
A. Abduction and internal rotation, B. Abduction and external rotation, C. Flexion, D. Extension
B: Abduction and external rotation
Answer: B: Abduction and external rotation 
Explanation: None