Final answer:
Line l is perpendicular to line n.
Step-by-step explanation:
In this scenario, line m is perpendicular to lines l and n, while line n is parallel to line p.
To determine which statement is true, we need to examine the relationships between the lines.
Since line m is perpendicular to lines l and n, and line n is parallel to line p, we can conclude that line l is perpendicular to line n.
Therefore, the correct statement is:
Line l is perpendicular to line n.