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: Orthopaedics
[{'content': 'If the head of the radius is removed, it will result in : \nSelect and explain. \nA. Lengthening of limb, B. Valgus deformity, C. Varus deformity, D. No deformity', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Complications of radial head excision in children :\n\nProximal migration of radius with inferior radio - ulnar (distal radio - ulnar) joint instability.\nPostero - lateral instability.\nCubitus valgus deformity.', 'role': 'assistant'}]