Let $W(x)$ denote the Wronskian of two linearly independent solutions $y_{1}(x)$ and $y_{2}(x)$ of the differential equation
$$(x-1) \frac{d^{2} y}{d x^{2}}+2 \frac{d y}{d x}+x e^{x} y=0, \quad x>1 .$$
If $W(2)=2$, then the value of $W(5)$ is
- $\dfrac{1}{8}$
- $\dfrac{1}{5}$
- $5$
- $8$
