Answer
True
Work Step by Step
When $f \to b^{-}$, then $\lim\limits_{f \to b^{-}}f(b)=f(b)$
When $f \to b^{+}$, then $\lim\limits_{f \to b^{+}}f(b)=f(b)$
We see that $f$ is continuous on $[a,c]$
Therefore, the given statement is $\bf{True}$.