In context of the given figure, which of the following statement is correct?

1. B is not a point on segment $\overline{AC}$

2. B is the initial point of the ray $\overrightarrow{AD}$

3. D is a point on the ray $\overrightarrow{CA}$

4. C is a point on the ray $\overrightarrow{BD}$

From the figure, the points lie on a line in the order A, B, C and D.

Ray BD starts at B and extends in the direction of D, passing through C. So C is a point on ray BD. This statement is correct.

Hence, option 4 is the correct option.