Identify the figure given in the options which when put in place of? will logically complete the series.

Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e.
.
The top letters are shifting their position in the corners from left to right and alternately and increasing by 1.
The bottom letters are shifting their position in the corners from left to right and alternately and increasing by 1.
