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': 'Structure passing deep to flexor retinaculum is - \nSelect and explain. \nA. Post tibial artery, B. Long saphenous vein, C. Tibialis anterior tendon, D. Peroneus tertius', 'role': 'user'}, {'content': 'Answer: A \nExplanation: From medial to lateral, structures passing under flexor retinaculum\n-\xa0\xa0\xa0\xa0\xa0\xa0\xa0 Tibialis posterior\n-\xa0\xa0\xa0\xa0\xa0\xa0\xa0 Flexor digitorum longus\n-\xa0\xa0\xa0\xa0\xa0\xa0\xa0 Posterior tibial vessels\n-\xa0\xa0\xa0\xa0\xa0\xa0\xa0 Tibial nerve\n-\xa0\xa0\xa0\xa0\xa0\xa0\xa0 Flexor hallucis longus', 'role': 'assistant'}]