Match the following measuring devices with their principle of measurement.
$$\begin{array}{|l|l|} \hline \textbf{Measuring Device} & \textbf{Principle of Measurement} \\ \hline \text{(P)} \text{ Optical pyrometer} & \text{(I)} \text{ Variation in mutual inductance} \\ \hline \text{(Q)} \text{ Thermocouple} & \text{(II)} \text{ Change in resistance} \\ \hline \text{(R)} \text{ Strain gauge} & \text{(III)} \text{Wavelength of radiated energy} \\ \hline \begin{array}{l} \text{(S)} \text{ Linear variable} \\ \text{differential transformer} \end{array} & \begin{array}{l} \text{(IV)} \text{ Electromotive force generated by two} \\ \text{dissimilar metals} \end{array} \\ \hline \end{array}$$
- $(\mathrm{P})-(\mathrm{III}),(\mathrm{Q})-(\mathrm{IV}),(\mathrm{R})-(\mathrm{II}),(\mathrm{S})-(\mathrm{I})$
- $(\mathrm{P})-(\mathrm{IV}),(\mathrm{Q})-(\mathrm{III}),(\mathrm{R})-(\mathrm{II}),(\mathrm{S})-(\mathrm{I})$
- $(\mathrm{P})-(\mathrm{III}),(\mathrm{Q})-(\mathrm{I}),(\mathrm{R})-(\mathrm{IV}),(\mathrm{S})-(\mathrm{II})$
- $(\mathrm{P})-(\mathrm{II}),(\mathrm{Q})-(\mathrm{IV}),(\mathrm{R})-(\mathrm{I}),(\mathrm{S})-(\mathrm{III})$
