This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Upper Limb Traumatology, Subject name: Orthopaedics
[{'content': 'Commonest type of shoulder dislocation: \nSelect and explain. \nA. Subcoracoid, B. Subglenoid, C. Posterior, D. Subclavicular', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Anterior Dislocation of Shoulder--Most Common Type of Shoulder Dislocation Types: Subcoracoid>Preglenoid>Subclavicular Mechanism of Injury: Abduction and External rotation force.', 'role': 'assistant'}]