Which option is a simple rotation of the image given below? 
A
B
C
D
The picture is a grid of coloured tiles with a small black-and-white step in the middle. To tell a true rotation from a flipped (mirrored) copy, pick that black-and-white step as a landmark and read the colours running clockwise around it. A turn of the whole grid keeps this clockwise order exactly the same, only starting from a different edge; a mirrored copy reverses the order, because a flip cannot be produced by turning the picture in its own plane.
Only option B keeps the clockwise colour order around the black-and-white landmark unchanged, which is exactly what a simple turn of the grid should do.
So the correct answer is Option B.








