There are two blocks, A and B. Block A contains a small blue square and a small black triangle. The small black triangle is touching the right edge of this block. This block also has a medium black triangle. The small blue square is to the left of the small black triangle which is below and near to the medium black triangle. The medium black triangle is touching the right edge of this block. Block B is above block A. It contains a medium yellow triangle and a big black square. This block also has one big yellow square and one medium blue triangle. The big yellow square is below, to the right of and near to the medium blue triangle. The medium yellow triangle is below the medium blue triangle. The big black square is far from and below the medium blue triangle.
What is below the medium yellow triangle? a small blue square or a medium black triangle?
small blue square  medium black triangle  both of them none of them