If $y=x^3log\, x,$ then $\frac{d^2y}{dx^2}$ is :

$5+6log\, x$ $x(3+2\, log \, x)$ $x(5 + 6\, log x)$ $x^2(3+2\, log \, x)$

$x(5 + 6\, log x)$