Which one of the following correctly represent the variation of electric field and electric potential with a distance r from a point charge?

The correct answer is option (3) :

Variation of electric field (E) of point charges (s) with the distance (r) is $E=\frac{kq}{r^2}⇒E∝\frac{1}{r^2}$

Variation of electric potential (V) of point charge (q) with distance (r) $V=\frac{kq}{r}⇒V∝\frac{1}{r}$