This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Demography and family planning, Subject name: Social & Preventive Medicine
Male to Female ratio is 
Select and explain. 
A. Males for 1000 popultaion, B. Females for 1000 males, C. Males for 1000 females, D. Females for 100 males
B: Females for 1000 males
Answer: B: Females for 1000 males 
Explanation: The number of females per 1000 males is known as sex ratio Sex composition is one of the basic demographic characteristic of the population Reference : Park&;s textbook of preventive and social medicine, 23rd edition, Page no: 482