Directions $(19$ – $21) :$ Read the information given below and on the basis of the information, select the correct alternative for each question given after the information.
- Six flats on a floor in two rows facing North and South are allotted to $\text{P, Q, R, S, T}$ and $\text{U}.$
- $\text{Q}$ gets a north facing flat and is not next to $\text{S}.$
- $\text{S}$ and $\text{U}$ get diagonally opposite flats.
- $\text{R}$ next to $\text{U},$ gets a south facing flat and $\text{T}$ gets a north facing flat.
The flats of which of the other pairs than $\text{SU},$ is diagonally opposite to each other $?$
- $\text{PT}$
- $\text{PQ}$
- $\text{QR}$
- $\text{TS}$