In each of the following questions, there are five numbered figure and two un-numbered figure on the extremes. These seven figures form a series. However one of the five numbered figures does not fit into the series. The number of that figure is the answer.

Explanation

The number of leaves is four and five altemately. The diameters in the circles rotates through 90 in each step. The shading descends in every step and once in the lowest position it reaches to the top in the next step in figure (1) the occurrence of two diameters in each circie is incorrect Hence answer is 1.