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