Hint:Sex ratio is the number of females present per thousand males in an area. Kerala state of India has highest sex ratio. There has always been news of excess of young boys in India and it is a result of abortion of female fetuses.
The practices of sex selective abortion to ensure the birth of male child is seen in many parts of India. There have been many attempts to by state and Central Government to discourage the abortion of female fetuses. Availability of ultrasound has been a major contribution; the preference for sons has been deeply rooted for cultural and economic reasons. It is believed that it is essential among Hindus for a son to perform rituals at his parents cremation and at every death anniversary thereafter the ratio between the number of males and females in a society is referred. The ratio is shaped by biological, social, technological, cultural and economic forces. It has impact on society, demography and economy sex ratio at birth is not equal. The differences in mortality rates and life expectancy for women and men. Women on an average live longer than men.Sex ratio is the number of females present per thousand males in an area. Sex ratio is nine hundred fourty females per one thousand males.
Hence, the correct answer is option (A).
Note: Migration is movement of people from one place to other for search of jobs.Migration can also affect the sex ratio in some Countries.