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': 'In posterior dislocation of hip,whole limb is rotated \nSelect and explain. \nA. Laterally, B. Medially, C. Medially rotated + extension, D. Laterally rotated + extension', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]