Which of the following cannot protect the user from contracting $AIDS$?
Diaphragm
Cervical caps
Vaults
All of these
Developing country having high death rate is
Statement $1$: One in every six person in the world in an Indian
Statement $2$: In India, there are more females than males
“Population is an auto-regulated system'' was said by
Which of the following statements about hepatitis$-B$ is incorrect?
Higher human population in cities is mainly due to