Question

Which one of the answer figures is the correct mirror image of the problem figure with respect to X-X ?

• A.

  

• B.

  

• C.

  

• D.

  

Hint:

The axis X-X is vertical, so the mirror image reverses left and right while up and down stay unchanged. Compare the outline features one by one with each option.

Answer 1

The Correct Option is C

The mirror line X-X is a vertical line, so the mirror image is obtained by interchanging left and right: every feature on the left of the problem figure moves to the right at the same height, and every feature on the right moves to the left at the same height. The top stays at the top and the bottom stays at the bottom.
Reverse the problem figure left to right and compare it with the options.
Option (3) reproduces every feature of the left-right reversed figure: the block at the top left (the block at the top right of the problem figure), the long horizontal run under it, the two-step staircase that follows (a short drop, a wide step back to the left, then a longer drop) and the small stepped pattern at the right wall (the small pattern at the left wall of the problem figure). Option (1) has no intermediate step in that staircase (the line drops straight down), option (2) has a much narrower second step, and option (4) replaces the small stepped pattern at the right wall by a long vertical run.
Answer: (3) the figure given as option 3