Three resistors with resistances $R$, $2R$ and $3R$ are joined in parallel. Using $I$ to stand for the current in the resistor of resistance $R$, which row shows the relationships between the currents in the resistors?
- AFor $R$: $I$, for $2R$: $\frac{1}{3}I$, for $3R$: $\frac{1}{2}I$
- BFor $R$: $I$, for $2R$: $\frac{1}{2}I$, for $3R$: $\frac{1}{3}I$
- CFor $R$: $I$, for $2R$: $\frac{2}{3}I$, for $3R$: $\frac{1}{3}I$
- DFor $R$: $I$, for $2R$: $2I$, for $3R$: $3I$