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': 'Which of the following is the root value of achilles tendon reflex? \nSelect and explain. \nA. L1, L2, B. L3, L4, C. S1, S2, D. S3, S4', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Achilles tendon reflex:Also known as ankle jerk.Root value: S1,S2Plantar flexion of the ankle joint on tapping the Achilles tendon. Must know:Deep tendon reflexes include reflex responses of the biceps, triceps, brachioradialis, patellar and Achilles tendons. Ref: Clinical Anatomy By Regions By Richard S. Snell, 2011, Page 23.', 'role': 'assistant'}]