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': 'A pole vaulter had a fall during pole vaulting and had paralysis of the arm . Which of the following investigations gives the best recovery prognosis - \nSelect and explain. \nA. Electromyography, B. Muscle biopsy, C. Strength Duration Curve, D. Creatime phosphokinase levels', 'role': 'user'}, {'content': 'Answer: A \nExplanation: "The electrodiagnostic tests include EMG, nerve conduction study, somatosensory-evoked potential, percutaneous\xa0electric stimulation etc. EMG (electromyography) is by far the most reliable and effective test which successfully\xa0identifies the roots, involved". \xa0____Ebnezar', 'role': 'assistant'}]