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': 'A healthy young athlete is sitting at the edge of the table with knee at 90 degree flexion. He fully extends it. What will happen? \nSelect and explain. \nA. Movement of tibial tuberosity towards centre of the patella, B. Movement of tibial tuberosity towards lateral border of patella, C. Movement of tibial tuberosity towards medial border of patella, D. No change in position', 'role': 'user'}, {'content': 'Answer: B \nExplanation: In a normal knee flexed 90 degree, the tibial tuberosity aligns with the medial half of the patella. The tibial tuberosity moves laterally during extension and aligns with the lateral half of the patella at full extension. Ref: Basic Biomechanics of the Musculoskeletal System, 3e By Margareta Nordin, Victor Hirsch Frankel, 2001, Page 184.', 'role': 'assistant'}]