There are three blocks. We call them A, B and C. One medium blue circle, a small yellow triangle and one small yellow square are in block A. To the right of the small yellow triangle and the small yellow square there is the medium blue circle. Below and near to a small black triangle there is the medium blue circle. Below the small yellow square there is the small yellow triangle. Block B is to the right of block A. It contains a medium black square. Below block B there is block C. It has one small blue triangle. There is also a small blue circle in this block. Below and touching the small blue circle is the small blue triangle.
Which object is to the right of a small black triangle? the medium black square or the small yellow triangle?
the medium black square  the small yellow triangle  both of them none of them