We have three blocks. Lets call them A, B and C. Block C is to the right of B. Block B is above A. Block A has one big black triangle and one medium blue square. There is also one big yellow square touching the bottom edge of this block. The big yellow square is to the left of the big black triangle. This shape is below and to the right of the medium blue square.. The big black triangle is touching the right edge of this block. This shape is to the right of the medium blue square. Block B contains one medium blue circle, one big blue square and one medium yellow square. A medium black triangle is touching the right edge of this block. To the left of and below a small black triangle there is a big blue triangle. The medium blue circle is to the right of the big blue square. The medium yellow square is touching the right edge of this block. The big blue triangle is touching the bottom edge of this block. The small black triangle is touching the right edge of this block. Above the big blue triangle is the medium blue circle. It is to the left of the medium yellow square. Block C has a medium blue square.
What is above the big yellow square? a medium yellow square or a big blue square?
medium yellow square  big blue square  both of them none of them