Step 1: To find the mirror image of a word, reverse the order of its letters and flip each individual letter horizontally, as it would appear reflected in a mirror placed to the right of the word. Step 2: For 'DISC', reversing the letter order gives C-S-I-D, and each of these letters must also appear left-right flipped, not just reordered. Step 3: Compare each option to this reversed, flipped sequence; only the option that shows the letters as C-S-I-D with every letter correctly mirrored (not just reordered or upside down) is the true mirror image. So the correct mirror image is the option showing the letters reversed and flipped, i.e. Option B.