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: Surgery
[{'content': 'Z score measures the bone mineral density compred to ? \nSelect and explain. \nA. Age, Race and sex matched individuals, B. Race and sex matched individuals, C. Sex matched individuals, D. None of the above', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Age, Race and sex matched individuals T Score and Z score are the measures of bone mineral density. Z score : Measures the bone mineral density in terms standard detion from the mean bone mineral density of age, race and sex matched individuals. T score : Measures the bone mineral density in terms standard detion from the mean bone mineral density of race and sex matched individuals of normal younger age group.", 'role': 'assistant'}]