Select correct answer for the following series

${\displaystyle \underset{n=1}{\overset{}{}}}\frac{n}{n^3+n}$

$\frac{n}{n^3+n}\frac{n}{n^3+n^3}=\frac{1}{2}\frac{1}{n^2}$ and series diverges

$\frac{n}{n^3+n}\frac{n}{n^3}=\frac{1}{n^2}$ and series diverges

$\frac{n}{n^3+n}\frac{n}{n^3}=\frac{1}{n^2}$ and series converges

$\frac{n}{n^3+n}\frac{n}{n^3+n^3}=\frac{1}{2}\frac{1}{n^2}$ and series converges