This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Census, SRS, NFHS, DLHS, VRS, Subject name: Social & Preventive Medicine
In a city of 10000, Males : Females are 1 : 1. Sex ratio is:- 
Select and explain. 
A. 1, B. 50, C. 5000, D. None of the above
D: None of the above
Answer: D: None of the above 
Explanation: Sex Ratio = Females/ Males X 1000 1x/1x X1000 = 1000