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If $x > 0$ and $y > 0$, then $\log_{x^{2}}{y}=$

I. $\log_{x}{{y}^{2}}$ II. $\log_{x}{\sqrt{y}}$ III. $\log_{x}{\cfrac{y}{2}}$

I. $\log_{x}{{y}^{2}}$

II. $\log_{x}{\sqrt{y}}$

III. $\log_{x}{\cfrac{y}{2}}$

$\text{I only}$

$\text{II only}$

$\text{III only}$

$\text{I and II only}$

$\text{II and III only}$