This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Head Injury, Subject name: Surgery
[{'content': 'Prognosis in head injury is best given by \nSelect and explain. \nA. Glasgow coma scale, B. Age of patient, C. Mode of injury, D. CT head', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e. Glasgow coma scale Glasgow coma scale is used to determine the conscious level of the patientIt is based on EVM i.e. Eye Opening, Verbal response & Motor responseA) Eye openingB) Verbal responseC) Motor responseSpontaneous - 4 To Voice - 3 To pain - 2 None - 01Oriented - 5 Confused - 4 Inappropriate words - 3 Incomprehensible sound - 2 None -1Obeys commands - 6 Localises pain - 5 Withdraws (pain) - 4 Flexion (pain) - 3 Extension (pain) - 2 None - 1Ranges from 3 to 15.A score of 7 or less is classed as comaA score of 9 or more excludes coma", 'role': 'assistant'}]