Count the dots. From the third box on, each box should be linked to the two boxes before it. Which box is wrong?

Each count should be the sum of the two counts before it: $1+2=3,2+3=5,3+5=8$. Box (d) has 6 dots instead of 5. (Box (e), with 8, fits only if the box before it has 5.) So (d) is wrong.