In a triangle ABC, AB = 12, BC = 18 and AC = 15. The medians AX and BY intersect sides BC and AC at X and Y respectively. If AX and BX intersect each other at O, then what is the value of OX?

A

$$4\surd23$$

B

$$\surd23$$

C

$$2\surd23$$

D

$$\frac{(\surd23)}{(\surd2)}$$