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