Resistors P, Q and R in the circuit each have the same resistance. The battery, with negligible internal resistance, delivers a total power of $12\,\text{W}$. What is the power dissipated as heat in resistor R?
- A$2\,\text{W}$
- B$3\,\text{W}$
- C$4\,\text{W}$
- D$6\,\text{W}$