Find the odd one.

Let's evaluate the correlation between the upper and lower figures within each option pair:
* In Pair A, both the top and bottom diagrams are perfectly identical.
* In Pair B, both the top and bottom diagrams are perfectly identical.
* In Pair C, both the top and bottom diagrams are perfectly identical.
* In Pair D, the top figure has the arrow pointing towards the upper-left with the corner triangle at the top-left, while the bottom figure has the arrow pointing towards the lower-right with the corner triangle at the bottom-right.

Since Pair D is the only option where the top and bottom figures are different (non-identical transformations), it is the odd one out.