$P,Q,R,S,T,U,V,$ and $W$ are seated around a circular table.
Which of the following must be true?
Here the most frequently used person is $R$ - so we should fill $R$ first. That's points $2$ and $3.$ We get
$T \_\; \_ R \_ U\_\;\_$ (Assume there is a circular connection between either ends)
After this only one opposite position will be left (positions $3$ and $7)$ -- which is needed for $(S, W)$ as per given condition $1.$
So, straight away $C$ is the answer.
Counter examples for options A, B, and D can be as follows:
For option A:
For options B and D: