What number will come in the missing fraction to make it equal <br> $\frac{1}{5} = \frac{2}{10} = \frac{3}{15} = . ..... . = \frac{5}{25}$

Question

$\begin{array}{11} (a)\; \frac{3}{20} \\ (b)\; \frac{4}{15} \\ (c)\; \frac{6}{30} \\ (d)\; \frac{4}{20} \end{array}$