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