Exponential phase of human growth started about
$1$ $A.D.$
$1600$ $A.D.$
$1750$ $A.D.$
$1975$ $A.D.$
According to $2001 \;census$, Indian population was:
$A$ : Once conception has occurred abortion can be induced by mifepristone drug.
$R$ : Mifepristone is progesterone antagonistic.
Which one of the following is an example of Hormone releasing $IUD$ ?
Average population density on earth is