In the population of world, how many persons are added per year
$4.11$ crores
$5.5$ crores
$8$ crores
$10$ crores
A force which acts against the achievement of highest possible level to population growth is known as
Accumulation of national resources and saving is known as
Human population after $17$th century $A.D.$ is thought to be in
Which of the following cannot protect the user from contracting $AIDS$?
The bio-index number means