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
[{'content': 'A 24-yar old male, known epileptic, presented following a seizure with pain in the right shoulder region. Examination revealed that the right upper limb was adducted and internally rotated and the movements could not be performed. Which of the following is the most likely diagnosis - \nSelect and explain. \nA. Posterior dislocation of shoulder, B. Luxatio erecta, C. Intrathoracic dislocation of shoulder, D. Subglenoid dislocation of shoulder', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]