The population growth rate is maximum in which of the following countries?

Given below are two statements: one is labelled as Assertion $A$ and the other is labelled as Reason $R$.
Assertion $A$: The logistic growth model of populations is considered more realistic than the exponential growth model.
Reason $R$: Resources are finite.
In the light of the above statements, choose the most appropriate answer from the options given below:

In a population,the condition at which the rate of addition of new members is more than the rate of individuals lost indicates:

The equation of Verhulst-Pearl logistic growth is $\frac{dN}{dt}=rN\left[\frac{K-N}{K}\right]$. From this equation,$K$ indicates:

Exponential growth in human population is observed in:

An asymptote in a logistic growth curve is obtained when: