The answer is the lowest one to the right - the one with the round outside boundary
edit-Took me less than 30 seconds, and most of that time was figuring out what the fuck I was reading.
nope
it's actually the top right with half of the white/line thing filled in black
look at how the shapes form in different layers
excluding the pi chart like thing, there are three different layers of shapes, going from innermost to outermost
there are three different kinds of shapes that occur: square, diamond (square rotated 90deg), and circle.
If you look at which layer a certain shape is, it goes:
Sq in position 1
Sq in position 2
Sq in position 3, 2 times
Dm in position 1, 2 times
Dm in position 2
Dm in position 3
Cir in position 1
Cir in position 2, 2 times
Cir in position 3
every shape is attached to a layer, and one layer has two of the same shape
if we apply that to the little knob in the middle, we see its already in 1 position 2 times, so the other knob is in position 1, and the knob you have to draw in on the top right picture is position 3