ff the HCF of $$xy^{3}, x^{2}y$$ and $$x^{3} y^{4}$$ is $$xy$$, then their LCM is _________.

A

$$x^{3}, y^{4}$$

B

$$x^{3}, y^{3}$$

C

$$x^{4}, y^{3}$$

D

$$x^{4}, y^{4}$$