What expression is equivalent to...? Screenshots attached. Help, please!

[tex]\sqrt{\frac{2x^{5}}{18}}=\sqrt{\frac{x^{5}}{9}}=\frac{\sqrt{x^{5} }}{\sqrt{9}}=\\ [/tex]
[tex]\frac{\sqrt{x^{4}\times \: x}}{3}= \frac{\sqrt{x}^{4} \times\sqrt{x} }{3}=\frac{x^{2}\sqrt{x}}{3}\\ [/tex]
The answer is A