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