There are three blocks, A, B and C. Block A has one small blue square and a big blue triangle. The small blue square is to the right of a medium yellow square. Below the medium yellow square there is the big blue triangle. The small blue square is touching the right edge of this block. It is above the big blue triangle. Block B is to the left of block A. It contains one medium yellow triangle. This block also contains a big yellow square. The big yellow square is above and to the right of the medium yellow triangle. Finally, we have block C. It is below block A. It contains one medium black square and one medium blue square. To the left of and below the medium blue square there is the medium black square.
Which object is above a medium yellow triangle? the big blue triangle or the big yellow square?
the big blue triangle  the big yellow square  both of them none of them