Select the figure from among the given options that can replace the question mark(?) in the following series.

From the first to the second box, both of the figures inside the box are interchanged with each other. Smaller figures become big and bigger figures become small.

From the third to the fourth box, both of the figures inside the box are interchanged with each other. Smaller figures become big and bigger figures become small.

Similarly, from the fifth to the sixth box, both of the figures inside the box will be interchanged with each other. Smaller figures become big and bigger figures become small.

Hence the figure given in option (a) will come in place of the question mark.