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
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 - 
Select and explain. 
A. Electromyography, B. Muscle biopsy, C. Strength Duration Curve, D. Creatime phosphokinase levels
A: Electromyography
Answer: A: Electromyography 
Explanation: "The electrodiagnostic tests include EMG, nerve conduction study, somatosensory-evoked potential, percutaneous electric stimulation etc. EMG (electromyography) is by far the most reliable and effective test which successfully identifies the roots, involved".  ____Ebnezar