Name the line segments determined by the three collinear points $P, Q$ and $R$.

Two lines intersect in a point.

Two lines may intersect in two points.

A segment has no length.

Two distinct points always determine a line.

Every ray has a finite length.

A ray has one end-point only.

A segment has one end-point only.

The ray $\mathrm{AB}$ is same as ray $\mathrm{BA}$.