Answer : The correct option is, (b) point.
Step-by-step explanation :
Line : In a geometry a line is straight (no bends). It extends in both the directions without end that means a line has no ends.
Line segment : It is a line that connects two points. It has definite end points.
Plane : It is a flat surface with no thickness. It extends forever.
Ray : It is a part of line that starts with point but no end point.
Point : It is an exact location that has no size, only position.
Hence, the in the symbol line AB the letter A represent a point.