Centre of two concentric circles is O. The area of two circles is 616 cm$$^2$$ and 154 cm$$^2$$ respectively. A tangent is drawn through point A on the larger circle to the smaller circle. This tangent touches small circle at B and intersects larger circle at C. What is the length (in cm) of AC?

A

$$12\surd3$$

B

$$14\surd3$$

C

$$10\surd6$$

D

$$18\surd2$$