Question

If $l,m$ and $n$ be three distinct lines such that $l||m$ and $l||n$, then ____.

• A. $m=n$
• B. $l\perp n$
• C. $m\perp n$
• D. $m||n$

Answer 1

The correct option is D $m||n$

It is given, that line $l$ is parallel to both, line $m$ and line $n$.

$\Rightarrow l||m$ and $l||n$.

$\therefore m$ must be parallel to line $n$.