The correct option is D 4
The bent pin gets laterally inverted and vertically inverted alternately and moves to the adjacent side (of the square boundary) in a CW direction in each step,. The curved arrow rotates 90oACW and moves to the adjacent side CW in each step. As for the third element - in one step the outer 'L' shaped symbol gets laterally inverted and in the next step the element gets vertically inverted. Or, similar figure reappears in every fourth step. So, after fig. (E), the fig. (B) should reappear.