Housing problems, health problems, pollution problems etc. are created by the
Low working capabilities of persons
Non-availability of national resources
Higher population growth rate
$(a)$ and $(b)$ both
The concept that “Population tends to increase geometrically while food supply increases arithmetically'' was put forward by
In the population of world, how many persons are added per year
Which of the following statements about hepatitis$-B$ is incorrect?
In vasectomy, a small part of the .................. is removed through a small incision on the scrotum.
The centre of $WHO$ is at