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: Anatomy
[{'content': 'The main action of muscle "GameIlius" is: \nSelect and explain. \nA. Medial rotation of thigh, B. Lateral rotation of thigh, C. Flexion of hip, D. Extension of hip', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Lateral rotation of thigh', 'role': 'assistant'}]