Inductive Reasoning Test 7

In this inductive reasoning test, you have to find the next picture :

Solution of this inductive reasoning test :

In this question, there are two rules to follow at the same time. The first rule is that the colours of the squares follow a pattern: black squares change to grey, grey change to white and white change to black. The second rule is that the grid of squares is reflected in a vertical line through the centre of the grid.

Both these rules have to be applied simultaneously.
Following these rules, the next diagram in the sequence must be B.