Which statement is true about a pair of perpendicular lines?

A pair of perpendicular line segments always bisect each other.
A pair of perpendicular line segments always bisect each other.

A pair of perpendicular lines always intersect at exactly one point.
A pair of perpendicular lines always intersect at exactly one point.

The angles formed by a pair of perpendicular lines are always complementary.
The angles formed by a pair of perpendicular lines are always complementary.

The angles formed by a pair of perpendicular lines are always congruent and acute.
The angles formed by a pair of perpendicular lines are always congruent and acute.