It is given in the question that S is in the interior of angle PQR . It means
sum of measurements of angles PQS and SQR is equal to the measurement of angle PQR.
So to find the measurement of angle PQR, we have to add the measurements of the two given angles. That is
[tex]\angle PQR= 87+33=120[/tex]
Therefore the correct option is the first option.
