Four lines $p,q,l$ and $m$ are shown in the figure given below. Identify the pair(s) of parallel lines.

The correct option is D $m$ and $l$
We are given with a figure:


In this figure, lines $l$ and $m$ are parallel as the lines do not intersect when extended infinitely in both the directions.

Also, in this figure, lines $p$ and $q$ are parallel as the lines do not intersect when extended infinitely in both the directions.

There would be $2$ pairs of parallel lines:
$\text{Pair 1: Line l and Line m}$
$\text{Pair 2: Line p and Line q}$

Therefore, option (b.) and (d.) are the correct answers.