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