There are three blocks, A, B and C. One big black square is in block A. Block B is below block A. It contains one big yellow square. There is also a medium yellow circle in this block. The medium yellow circle is to the left of and above the big yellow square. Finally, there is block C below block A. It has one medium yellow circle and a medium yellow triangle. Above and to the right of the medium yellow triangle is the medium yellow circle.
Which object is below a black object? the medium triangle or the big yellow square?
the medium triangle  the big yellow square  both of them none of them