We have two blocks. We call them A and B. Block A has one small black circle and a medium blue triangle. The small black circle is touching the right edge of this block. It is touching and above the medium blue triangle. A big black circle is to the left of and above the medium blue triangle. To the right of block A there is block B which contains one big yellow triangle and a medium black triangle. The medium black triangle is touching the bottom edge of this block. The big yellow triangle is to the left of and above the medium black triangle.
What is to the left of the medium black triangle? a medium blue triangle or a yellow shape?
medium blue triangle  yellow shape both of them none of them