Thank you Alex, your comment helpded us to understand a bit more. However, we are still suck!!
Your explanation about the appendages being always at the top and bottom (when there are two of them) permits to eliminate the answers b
On the second row, there are already a box with three appendages so we can also eliminate answer e.
However, how can we choose betwwen answer a
? It can't be the direction as applying 'two left and one right like in the first and third rows' gives us answer c
which is wrong.
How are we supposed to know that in the second row, it has to be 'two right and one left'?
I am afraid I don't see the logic in there
There is certainly something else to consider, but we don't know what