C According to the distance formula, the distance ' $d$ ' between two points $(a, b)$ and $(c, d)$ is given by $\begin{array}{l} d=\sqrt[2]{(a-c)^2+(b-d)^2} \ldots . .(1) \\ d=\sqrt{(-3-0)^2+(4-0)^2}=5 \end{array}$ Therefore answer is $C$
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