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': 'Inversion is - \nSelect and explain. \nA. Sole of the foot upward, B. Sole of the foot outward, C. Sole of the foot inward, D. Sole in the neutral postion', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]