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': 'Best prognostic factor for head injury is: \nSelect and explain. \nA. Glassgow coma scale, B. Age, C. Mode of injury, D. CT findings', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans is \'a\' ie. Glasgow coma scale Repeat from All India 07Harrison writes- " In severe head injury, eye opening, the best motor response of the limbs, and verbal output have been found to be roughly predictive of outcome; these are summarized using the \' Glasgow coma scale "Glasgow coma scale is used to determine the conscious level of the patientRanges from 3 to 15.A score of 7 or less is classed as comaA score of 9 or more excludes coma', 'role': 'assistant'}]