Identify the differential equation solved by

$y=x^{-3}$

$x^2{y}^{\text{'}\text{'}}+3x{y}^{\text{'}}+6y=0$

$x^2{y}^{\text{'}\text{'}}+5x{y}^{\text{'}}+3y=0$

$x^2{y}^{\text{'}\text{'}}-5x{y}^{\text{'}}+6y=0$

$x^2{y}^{\text{'}\text{'}}-5x{y}^{\text{'}}-6y=0$

$x^2{y}^{\text{'}\text{'}}+5x{y}^{\text{'}}-2y=0$

None of the above.