<prompt> Sex ratio is1 male per 1000 females1000 females for 1000 malesNumber of female for 1000 males1000 females per 100000 males  <response>: Sex ratio is defined as the number of females per 1000 males. It is one of the basic demographic characteristic of a population. Reference : Park;s textbook of preventive and social medicine, 23rd edition, pg no:482 