At a point on a streamline, the velocity is 3 m/sec and the radius of curvature is 9 m. If the rate of increase of velocity along the streamline at this point is $$\frac{1}{3}$$ m/sec/m, then the total acceleration at this point would be _____

A

$$1  m/sec^2$$

B

$$3  m/sec^2$$

C

$$\frac{1}{3}  m/sec^2$$

D

$$\surd{2}  m/sec^2$$