There are three blocks, A, B and C. Block A is to the right of B. Block B is to the left of C. Block A has a medium blue square and one medium black triangle. Near to the medium black triangle is the medium blue square. Block B contains one small yellow triangle. And block C contains a medium black square and one medium yellow square. The medium black square is touching the bottom edge of this block. This block also has a small blue triangle. Below and to the right of the medium yellow square is the medium black square. It is below and to the right of the small blue triangle.
What is below the medium yellow square? a medium blue square or a medium black triangle?
medium blue square  medium black triangle  both of them none of them