AB is a chord of a circle with centre O. C is a point on the circle in the minor sector. If $$\angle ABO= 50^{\circ}$$, then what is the degree measure of $$\angle$$ ACB?

A

$$100^{\circ}$$

B

$$110^{\circ}$$

C

$$140^{\circ}$$

D

$$130^{\circ}$$