We have three blocks, A, B and C. Block B is above C and block A is to the left of B. Block A contains one small yellow triangle. The small yellow triangle is below, near to and touching a small blue triangle. Block B has one medium black square, one medium blue square and a medium yellow square. The medium black square is above and to the right of the medium yellow square. The medium blue square is to the right of the medium yellow square. Block C has one medium blue triangle.
Which object is to the left of a medium yellow square? the medium black square or the small blue triangle?
the medium black square  the small blue triangle  both of them none of them