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: Unknown
The Hb level in healthy women has mean 13.5 g/dl and standard deviation 1.5 g/dl, what is the Z score for a women with Hb level 16.5 g/dl 
Select and explain. 
A. 9, B. 10, C. 2, D. 1
C: 2
Answer: C: 2 
Explanation: None