This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Social & Preventive Medicine
[{'content': 'The Hb level in healthy women has mean 13.5 g/dl and standard detion 1.5 g/dl, what is the Z score for a woman with Hb level 15.0 g/dl: \nSelect and explain. \nA. 9, B. 10, C. 2, D. 1', 'role': 'user'}, {'content': "Answer: D \nExplanation: The value (15g/dl) lies 1 SD (1.5g/dl) above the mean of 13.5g/dl. Hence the Z score is 1. Ref : Park's Textbook of Preventive medicine", 'role': 'assistant'}]