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