2006-II-25

Ans: D
A is the image of reflecting the figure about the vertical line.

B is the image of rotating the figure clockwise about $O$ through ${90}^{\circ }$.

C is the image of rotating the figure anticlockwise about $O$ through ${90}^{\circ }$ and then reflecting about the vertical line.

D is the image of rotating the figure anticlockwise about $O$ through ${90}^{\circ }$.