Visual IQ puzzle (MENSA Norway, difficulty 2)
Correct answer: C
Explanation: Consider each diagonal from top-left to bottom-right, there is a repetition in the bottom half in each image. In the first and fourth diagonal starting from bottom left, there are 3 dots at the bottom of the image. In the second and fifth  diagonal starting from bottom left, there is one dot at the bottom of each image. In the third diagonal there 2 dots on opposite sides at the bottom of each image. Now consider the diagonals from top-right to bottom-left. In the first and fourth diagonal starting from the top-left, there are 2 dots on the opposite sides at the top of the image. In the second and fifth diagonals starting from top-left there is 1 dot at the top of each image. And in the third diagonal starting from top-left, there are 2 dots at the top of each image.