Which of the following is a terminal method of contraception to prevent any more pregnancies?
Barrier method
$IUD$
Hormonal method
Sterilisation method
The scientist who propounded that population is a group of species
Statement $1$: One in every six person in the world in an Indian
Statement $2$: In India, there are more females than males
The decreasing sequence of most populated first three cities of $M.P$. according to $1991$ census are