Optical illusion test: Find the odd one

Optical illusion test: Find the odd one #brain #opticalillusion #iqtestgame #findtheodd #mathgame#Brain Teasers, #Brain Test Game, #IQ Test, #intelligent Test, #Optical illusion, #Real IQ Test, #findthedifference #findodd, #Genius IQ Test, #puzzle #puzzlegame, #logicalpuzzle, Daily Puzzle, For Kids and anyone!
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[@GhulamAli-s4p]

Fourth line six no.

[@vijayalakshmivenkataraman3517]

4row6

[@saytheobvioustwitter2583]

Just find the PO OP. Get it??