Planes a and b are shown.

planes b and a intersect. plane b is vertical and contains vertical line n. plane a is horizontal and contains horizontal line m. lines m and n are perpendicular. line l is on plane a and it is slightly diagonal.
if a new line, p, is drawn parallel to line l, which statement is true?

line p must be drawn in plane b.
line p must be perpendicular to line m.
line p must be drawn so that it can lie in the same plane as line l.
line p must be drawn in the same plane as line n.