the puzzle creator.
The differences are deliberately subtle.
That is why many people will look at the image several times before noticing anything unusual.
So, is No. 5 the answer?
The intended answer appears to be #5.
However, there is an important caveat: this particular image appears to be an AI-generated or heavily edited puzzle image, so visual clues such as facial structure or body proportions aren’t reliable ways to determine a real person’s gender.
For the purposes of the puzzle, though, #5 is the apparent choice.
