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