What will come in place of?:

All the components of Question Figures are present in Answer Figure (3).

As per the given above question figure ,
Figure ( 2 ) of the answer figures is exactly the water image of the given original image . Thus , Given image will become opposite in water across the given line.So , option B is correct figure .

From first figure to second figure the main design rotates through 45° clockwise and each line segment is doubled.

From first figure to second figure the two smaller designs interchange positions and the half square rotates through 180°.

Except in Figure (3) , it is different from other three figures. In figure (3) there is a swastik mark.

From first figure to second figure four circles are introduced in the place of four quadrilaterals.