We have two blocks. We call them A and B. Block A is below B. Block A has a big blue square, a medium yellow circle and one big yellow triangle. The big blue square is below a big black circle and the medium yellow circle. A big black triangle is touching the right edge of this block. The medium yellow circle is below the big black triangle. It also contains a big yellow circle. Block B contains one medium blue square.
Which object is below a medium blue square? the medium yellow circle or the big black circle?
the medium yellow circle  the big black circle  both of them none of them