$A$ $2 \text{ V}$ battery is connected to a diode in forward bias. $A$ voltage of $0.5 \text{ V}$ is dropped across the diode,which is independent of the current flowing through it. $A$ current greater than $10 \text{ mA}$ causes excessive heating and damages the diode. If a current of $5 \text{ mA}$ is required in the diode,what value of series resistance must be connected in the circuit?
- A$3 \text{ k}\Omega$
- B$300 \text{ k}\Omega$
- C$300 \Omega$
- D$200 \text{ k}\Omega$
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