Sorry

This answer is incorrect.

Lines that are parallel do not intersect or meet.

If you look at the drawing below you will see that the only possible answer is the opposite sides of a rectangle

In this first example every possible combination of adjacent sides of a triangle are shown and you can see that they all intersect

image of three triangles each one highlighting two intersecting sides

In the second example every possible combination of adjacent sides of a pentagon are shown and you can see that they all intersect

image depicting five pentagons each hightlighting two intersecting sides

In the third example every combination of Opposite sides of a rectangle are shown and you can see that they do not intersect. In fact if you extended the lines in both directions forever they still would not intersect. Indicating that they are parallel

image depicting two rectangles each hightlightin two parallel sides

In the fourth example two radii of a circle are shown and you can see that they intersect at the center of the circle. Since every radius of a circle starts at the center of the circle any two radii would intersect there.

image depicting circle with two intersecting radii

 

Now let us try another one

Which of these line segments are perpendicular?

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