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 32 year old male with history of seizures with pain in left shoulder region, left upper limb is addicted and internally rotated, what is the diagnosis 
Select and explain. 
A. Anterior dislocation of shoulder, B. Posterior dislocation of shoulder, C. Inferior dislocation of shoulder, D. Impingement syndrome
B: Posterior dislocation of shoulder
Answer: B: Posterior dislocation of shoulder 
Explanation: None