Final answer:
In the given quadrilateral PQRS, option (d) 90° is the only possible value for angle ORS.
Step-by-step explanation:
In the given quadrilateral PQRS, it is stated that OR < RS.
The sum of the angles in a quadrilateral is 360 degrees.
Since OR < RS, it means that angle ORS is the smallest angle in the quadrilateral.
Therefore, for angle (a) to be 23°, angle ORS must be greater than 23°. This is not possible as angle ORS is the smallest angle in the quadrilateral. Hence, option (a) 23° is not possible for angle ORS.
Similarly, we can check for the other options (b), (c), and (d). Only option (d) 90° is possible for angle ORS.