Find an Expression for the General Term of the Series $\frac{x}{5}+\frac{x^{2}}{12}+\frac{x^{3}}{31}+\frac{x^{4}}{68}+\cdots$

Find an expression for the general term of the series $\frac{x}{5}+\frac{x^{2}}{12}+\frac{x^{3}}{31}+\frac{x^{4}}{68}+\cdots$

A) $\frac{x^{n}}{n+4}$ for $n \geq 1$ .
B) $\frac{x^{n}}{7 n-2}$ for $n \geq 1$ .
C) $\frac{x^{n}}{n^{3}+4}$ for $n \geq 1$ .
D) $\frac{x^{n}}{n^{2}+12}$ for $n \geq 1$ .