There are three blocks, A, B and C. Block B is below and A is to the right of C. Block A has a medium blue square and a medium black square. The medium blue square is to the left of the medium black square. Block B contains one small black square. Below a small black circle there is the small black square. Block C contains a medium blue square, a medium black circle and one small black circle. The medium blue square is above the medium black circle. It is to the right of and near to the small black circle.
What is to the left of the medium black square? a medium blue square or a medium black circle?
medium blue square  medium black circle  both of them none of them