Answer
The equivalent resistance is same in all four circuits.
Work Step by Step
In each of the circuits, the Resistors $R_{1}$ and $R_{2}$ are in parallel. The equivalent resistance is $\frac{R_{1}R_{2}}{R_{1} + R_{2}}$. This branch is connected in series with the battery and the resistor $R_{3}$.
So, the equivalent resistance is same in all four circuits.
