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': 'Planter flexion is brought about by which of these muscles: \nSelect and explain. \nA. Plantaris, B. FHL, C. Soleus, D. All', 'role': 'user'}, {'content': 'Answer: D \nExplanation: A. i.e. Plantans; B. i.e. FHL; C. i.e. Soleus', 'role': 'assistant'}]