To find the correct mirror image of the given figure when the mirror is placed at MN, we need to apply the following logic:

1. The mirror image of each character is flipped horizontally.
2. The sequence of characters remains in reverse order near the mirror.

Let's consider the given figure:

To find the mirror image:

• Start with the character closest to the mirror line.
• Write the characters in the reverse order while flipping each one horizontally.

Applying this to the given sequence "hUM65aN91Ty", we first reverse the sequence next to the mirror and horizontally flip each character accordingly. The correct option from the given choices is:

Therefore, the correct mirror image is depicted in the selected option above.