When an object or word is viewed in a mirror, its image is reversed horizontally. The appearance of each letter's mirror image is determined by its symmetry:
- Vertically symmetrical letters such as 'M' and 'A' appear unchanged.
- Letters like 'K' undergo reversal in their mirror images.
- The letter 'R' reflects as a backward 'R'.
- The letter 'E' appears as a backward 'E' when flipped horizontally.
Option (c) correctly illustrates these transformations by displaying the word "MARKER" mirrored letter by letter.