Which of the following statements about hepatitis$-B$ is incorrect?
It is one of the examples of $STD$
It is spread primarily by sexual contact, even by contaminated syringes and blood transfusion
It is $42$ nm enveloped virus containing $ss-RNA$ as the genetic material
Recombivax $HB$, vaccine is available to prevent hepatitis$-B$ infection
The best solution to population problem in India is to
July $11$ is observed as
The permissible use of the technique amniocentesisis for
“Population is an auto-regulated system'' was said by
Presently, the world population doubles after every