Which of the following is a simpler form of the radical expression sqrt 27x^4/75y^2?

In order to simplify this expression, this is how to do it.

I assume that the expression is like this one:

sqrt (27x^4 / 75y^2)

so

sqrt (9*3 x^4 / 25*5y^2)

= (3x2 / 5y) * sqrt (3 / 5)

So, the final expression or the simpler expression based from the given question is (3x2 / 5y) * sqrt (3 / 5)