The locus of a point which is equidistant from the line PQ forms a

A.

circle centre P

B.

pair of parallel lines each opposite to PQ

C.

circle centre Q

D.

perpendicular line to PQ

Correct answer is D

The locus of points at a fixed distance from the point P is a circle with the given P at its centre.

The locus of points at a fixed distance from the point Q is a circle with the given point Q at its centre

The locus of points equidistant from two points P and Q i.e line PQ is the perpendicular bisector of the segment determined by the points

Hence, The locus of a point which is equidistant from the line PQ forms a perpendicular line to PQ