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Two series resonant filters are as shown in the figure. Let the $\text{3-dB}$ bandwidth of Filter $1$ be $B_{1}$ and that of Filter $2$ be $B_{2}$. The value of $\frac{B_{1}}{B_{2}}$ is

1. $4$
2. $1$
3. $\frac{1}{2}$
4. $\frac{1}{4}$