According to the population of world, India is placed at
Second
First
Third
Fourth
(b) According to the population of world, India is placed at second and China first.
Number of females is more than males in
Human population after $17$th century $A.D.$ is thought to be in
Sex ratio in a species indicates the numerical relation between the number of
$NSEP$ stands for
Ratio of birth and death rates according to $1991$ census is
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