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': 'Equinus deformity refers to ? \nSelect and explain. \nA. Inversion of foot, B. Eversion of foot, C. Plantar flexion at ankle, D. Dorsi flexion at ankle', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Equinus deformity refers to plantar flexion at ankle joint with inability to do dorsi-flexion.It may be either congenital or acquired.Most common cause is contracture of gostracnemius or soleus or both.', 'role': 'assistant'}]