There are two blocks, A and B. One big blue triangle and one small yellow circle are in block A. The big blue triangle is touching the bottom edge of this block. It is touching, below and near to the small yellow circle. To the left of block A we have block B. It contains one medium blue triangle and one big blue triangle. A medium blue square is to the right of and near to the medium blue triangle which is above the big blue triangle. This block also contains a medium black square. The medium black square is below and to the right of the medium blue triangle.
Which object is to the left of a big blue triangle? the medium blue square or the medium black square?
the medium blue square  the medium black square  both of them none of them