Three identical resistors, each of resistance $R$, are connected in **parallel**. The equivalent resistance is:

For $n$ identical resistors in parallel: $\dfrac{1}{R_{eq}} = \dfrac{n}{R} \Rightarrow R_{eq} = \dfrac{R}{n}$. With $n = 3$, $R_{eq} = \dfrac{R}{3}$. In parallel the equivalent is always *less than the smallest* component — and option C ($3R$) is the series result, the most common trap.