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