This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nerve Injuries - 1, Subject name: Orthopaedics
[{'content': 'In 3-year-child with polio paralysis, tendon transfer operation is done at: \nSelect and explain. \nA. 2 months after the disease, B. 2 years after the disease, C. 6-12 months after the disease, D. After skeleton maturation', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Tendon transfers: Done to equalise an unbalanced paralysis or to use the motor power of working muscles for more useful functions. Not done before 5 years of age as the child has to be manageable enough to be taught proper exercises. As the child is 3 years old, tendon transfer should be done after 2 years (at 5 years of age).', 'role': 'assistant'}]