Which of the answer figure is exactly the mirror image of the question figure,…

Concept

A mirror reflection about a vertical line (the line X Y placed to the right of the figure) is a left–right flip. Every point keeps its height but its horizontal position is swapped from one side of the axis to the other. The image is laterally inverted: what leans to the right in the original leans to the left in the reflection, and any slanted stroke reverses its tilt — a stroke rising to the right ( / ) becomes a stroke rising to the left ( \ ), while the spiral's turning sense is reversed.

Applying it to this figure

1. Fix the axis: the mirror sits on the vertical line X Y at the right edge, so reflect everything horizontally (left becomes right).

2. Central slash: in the question figure the central diagonal rises to the right ( / ). After a left–right flip it must rise to the left ( \ ). So the correct answer is the figure whose central diagonal runs from the upper-left down to the lower-right ( \ ).

3. Spiral arms: each hooked arm that pointed toward the right side in the original must point toward the left side in the reflection, and the small parallel accent ticks move with their arms to the opposite side. The figure that satisfies both the reversed ( \ ) diagonal and the mirrored single-line spiral is the required mirror image.

Cross-check

To confirm a reflection, the original and its mirror image sit on opposite sides of the line X Y and read as a folded pair across it: the slash, the hooked arms and the accent ticks of the answer line up with those of the original, each on the far side of the axis. A figure that still shows the right-rising ( / ) diagonal is only a rotation of the original, not a reflection, and a figure drawn with doubled lines or with the diagonal missing cannot be the mirror image at all.