Choose the correct one from among the alternative $\text{A, B, C. D}$ after matching an item in Group $1$ with the most appropriate item in Group $2.$
$\begin{array}{ll}\quad \textbf{Group 1} & \quad \textbf{Group 2} \\ \text {P Ring modulator} & 1 \text { Clock recovery} \\ \text {Q VCO} & 2 \text { Demodulation of FM} \\ \text {R Foster-Seely discriminator} & 3 \text { Frequency conversion} \\ \text {S Mixer} & 4 \text { Summing the two inputs} \\ & 5 \text{ Generation of FM} \\ & 6 \text { Generation of DSB-Sc}\end{array}$
- $\text{P – 1 Q – 3 R – 2 S – 4}$
- $\text{P – 6 Q – 5 R – 2 S – 3}$
- $\text{P – 6 Q – 1 R – 3 S – 2}$
- $\text{P – 5 Q – 6 R – 1 S – 3}$