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Group I lists four types of $p-n$ junction diodes. Match each device in Group I with one of the options in Group II to indicate the bias condition of that device in its normal mode of operation.

$$\begin{array}{ll} \textbf{Group I} & \quad \textbf{Group II} \\ \text{P. Zener Diode} & \text{1. Forward bias} \\ \text{Q. Solar cell} & \text{2. Reverse bias} \\ \text{R. LASER diode} & \\ \text{S. Avalanche Photodiode} & \end{array}$$

1. $\text{P – 1, Q – 2, R – 1, S – 2}$
2. $\text{P – 2, Q – 1, R – 1, S – 2}$
3. $\mathrm{P}-2, \mathrm{Q}-2, \mathrm{R}-1, \mathrm{S}-1$
4. $\mathrm{P}-2, \mathrm{Q}-1, \mathrm{R}-2, \mathrm{S}-2$