Answer:
The correct option is 3.
Explanation:
Given information: Lines r and s are parallel to each other.
If two lines intersect each other at a point then the opposite angles are called vertically opposite angles and these vertically opposite angles are always same.
From the given figure it is clear that the angle having measure d° and angle having measure 125° are vertically opposite angles. So,
(Vertically opposite angles)
The value of d is 125, therefore the correct option is 3.