Choose the correct mirror image from the given options for the word "YOUTH", if the vertical mirror is kept at its right side (XY).

When a vertical mirror is placed to the right (XY) of a word, the sequence of the characters is completely reversed (the last letter appears first, and the first letter appears last). Additionally, each individual letter undergoes lateral inversion (left and right interchange).
Since the capital letters 'Y', 'O', 'U', 'T', and 'H' are all vertically symmetrical, their individual mirror images look identical to their original forms.
Reversing the sequence of these symmetrical letters gives: "HTUOY".