There are three blocks, A, B and C. Blocks A and C are above B. Block A contains one medium yellow triangle. Block B has a medium blue triangle. Block C contains two big black squares. Big black square number one is above big black square number two. Big black square number two is touching the bottom edge of this block. This block also contains one big blue square and one medium yellow triangle. It also contains a small blue square. The big blue square is near to, to the left of and below big black square number one. The medium yellow triangle is below and to the left of the small blue square.
What is above the medium blue triangle? a medium yellow triangle or a big black square that is touching the bottom edge of a block?
medium yellow triangle  big black square  that is touching the bottom edge of a block  both of them none of them