Identify the correct mirror image of the given figure along X-X' axis :
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The axis X-X' is a vertical line on the right, so the mirror image is a left-right reversal: the left and right columns swap and every slanted line reverses its slant.
The mirror line X-X' is vertical, so the image is obtained by reversing left and right. In the given figure the top-left cell holds a square with a diagonal running from the top-left corner to the centre of the figure, the top-right cell holds a diamond, the bottom-left cell holds a downward-pointing triangle and the bottom-right cell is divided into four small squares. After the left-right reversal the diamond moves to the top-left, the square moves to the top-right and its diagonal now runs from the top-right corner to the centre (slanting as '/'), the four small squares move to the bottom-left and the downward triangle moves to the bottom-right (a triangle pointing down stays pointing down). Only the second figure shows this arrangement. The first figure is the original unchanged, the third figure swaps the columns but keeps the diagonal slanting the original way (from the top-left of its cell), and the fourth figure keeps the columns in place and only changes the diagonal. Answer: (2) the second figure
