Answer-
Option D. Consecutive angles of the parallelogram are supplementary.
Solution-
As PQRS is a parallelogram, it has two sets of parallel lines, they are
QR || PS and PQ || RS
According to properties of parallel lines, the consecutive interior angles add up to 180°
So,
[tex]\Rightarrow m\angle P+m\angle Q=180^{\circ}[/tex]
[tex]\Rightarrow 65^{\circ}+m\angle Q=180^{\circ}[/tex]
[tex]\Rightarrow m\angle Q=180^{\circ}-65^{\circ}=115^{\circ}[/tex]
