There are three blocks, A, B and C. Block C is below block A and above block B. Block A has one medium black triangle, a small yellow triangle and a medium blue circle. The small yellow triangle is touching the bottom edge of this block. It is to the right of the medium blue circle.. The medium black triangle is to the left of and above the small yellow triangle. Block B contains a medium blue triangle. Block C has one medium yellow triangle, one small yellow triangle and one small blue square. The small yellow triangle is to the left of a medium yellow circle and a big blue circle. The big blue circle is touching the bottom edge of this block. There is also a big blue square in this block. Near to the small object which is to the left of the medium yellow circle there is the big blue square.. To the right of the small yellow triangle is the medium yellow triangle.
What is above the medium blue triangle? a medium black triangle or a small blue square?
medium black triangle  small blue square  both of them none of them