I've come across an exercise that asks the reader to state the correct answer. For me, the only one right is the third, but I would like to know why the first one is not correct also:
The line $r$ is parallel to the plane $\alpha$, but is not contained in it. Choose the correct alternative:
The are, in $\alpha$, lines that are perpendicular to $r$
All lines in $\alpha$ are parallel to $r$
There are, in $\alpha$, lines that are parallel to $r$ and lines that are skew to $r$
Line $r$ cannot be coplanar to any line in $\alpha$
Every plane that contains $r$ is parallel to $\alpha$
Thank you.