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': 'Knowledge of the segmental cutaneous innervation of the skin of the lower extremity is important in determining the level of intervertebral disc disease. Thus, S1 nerve root irritation will result in pain located along the - \nSelect and explain. \nA. Anterior aspect of the thigh, B. Medial aspect of the thigh, C. Anteromedial aspect of the leg, D. Lateral side of the foot', 'role': 'user'}, {'content': 'Answer: D \nExplanation: S1 nerve root impairment results in\n\nWeak plantar flexion\nWeak eversion of the foot\nDepressed ankle jerk\nSensory loss along lateral border of foot', 'role': 'assistant'}]