Group the given figures into three classes using each figure only once.

   

As per the given above question figure ,
Figure ( 1 ) of the answer figures is exactly the mirror image of the given original image , Because given image will become opposite in mirror across the given line AB.

From first figure to second figure the two marked squares interchange position.

According to question ,
The mirror image always be opposite the original image across the given line. Real time is shown in original image 2 : 15 ,While In the reflection a time of 4 :15 will look approximately like .

Answer B

As per the given above question figure ,
Figure ( 4 ) of the answer figures is exactly the mirror image of the given original image across the given line , Because it will become opposite to the given line XY.

According to given question figure ,
we can say that the mirror image always be opposite the original image across the given line. So , correct figure will be option D .

As we know that the mirror image always be opposite the original image across the given line. It will become opposite to the given line .As shown in given below .
Therefore, option B is correct figure .