If a mirror is placed along line LM, which answer figure is the correct mirror…

Mirror rule: A vertical mirror along LM reverses left and right, while top and bottom positions remain unchanged.

In the original figure:

• The top bent/slanting segment extends towards the right.

• The internal diagonal runs from the left side towards the lower-right side.

After reflection:

• The top bent/slanting segment must extend towards the left.

• The internal diagonal must reverse and run from the right side towards the lower-left side.

Only option B shows both features correctly reversed. Therefore, option B is the correct mirror image.