The correct option is C 2
Three different images with a line for each of them is given.
Let's observe each shape around the line.
We can see that the halves of the Image 1 and Image 3 have the same features and both the images are mirrored halves of each other, then the shape is symmetrical about the line.
However, both the halves of Image 2 do not have same features.
Also they cannot exactly overlap each other.
Hence, Image 2 is not symmetrical about the line.