The Logic here is as follows : 1. The symbols are moving in an anticlockwise direction. 2. Circles (shaded and blank) are moving in an anticlockwise direction. 3. The symbols x and + are moving as shown in the figures above. The Correct series here is as follows:
In the question, in figure 4, symbols '+' and 'x' are interchanged in order to get the correct answer. In figure 4, + and x is moving in a clockwise direction. Thus, figure 4 does not fit into the series. Hence, the correct answer is 'Option 4'.