If areas of similartriangles $$\triangle$$ ABC and $$\triangle$$ DEF are $$x^{2} cm^{2}$$ and $$y^{2} cm^{2}$$ respectively, and EF = a cm, then B (in cm) is:

A

$$\frac{y^{2}}{a^{2}x^{2}}$$

B

$$\frac{y}{ax}$$

C

$$\frac{ax}{y}$$

D

$$\frac{a^{2}x^{2}}{y^{2}}$$