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: Surgery
[{'content': 'Green extra aicular ahrodesis done for - \nSelect and explain. \nA. Genu Valgum, B. Coxa vara, C. Congenital veical talus, D. Cubitus varus', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Congenital Veical Talus Grice and Green procedure is an extra aicular fusion (ahrodesis) of the subtalar joint. It is used in the treatment of patients of congenital veical talus between age of 4 to 8 years old along with open reduction of the deformity.", 'role': 'assistant'}]