Correct Answer: (a) Kerala, Puducherry, Tamil Nadu, Andhra Pradesh
Solution:As per provisional and final figures of Census 2011, the descending order of the sex-ratio of the given States is as follows:1. Kerala, 2. Puducherry, 3. Tamil Nadu, 4. Andhra Pradesh.
- There are three reasons why the sex ratio of populations varies and is rarely equal:
β Differences in mortality rates and life expectancy for women and men. Women, on average, live longer than men. This means that all else being equal, we would expect females to account for slightly more than half of the total population.
β Sex ratios at birth are not equal. In all countries, there are more male than female births. In the absence of selective abortion practices, births in a given population are typically male-biased the chances of having a boy are very slightly higher than having a girl.
β Migration can also affect the sex ratio of the population. If in some countries there is a significant amount of imported male-dominant labour, all else
being equal, we would expect males to account for more than half of the total population.