Which of the following is true for $r$-selected species?

Under which of the following conditions is the logistic population growth curve obtained?

The formula for exponential population growth is $:-$

Exponential population growth is represented by

Biotic potential refers to

Which one is correct for the logistic model of population growth?
$I.$ Population growth rate increases as the size of the population approaches the carrying capacity.
$II.$ All individuals have the same effect on population growth.
$III.$ There are unlimited natural resources.
$IV.$ As population increases,the competition goes on increasing.
Select the correct combination.