We have three blocks. We call them A, B and C. Block B is to the left of C and block A is to the left of B. Block A has one medium blue square. This block also has a medium black square. The medium blue square is below the medium black square. Block B contains one medium black square and one medium yellow square. The medium black square is below the medium yellow square. Block C contains one medium blue square and one medium yellow square. The medium blue square is below the medium yellow square.
Which object is to the left of a medium yellow square? the medium black square which is in block A or the medium black square which is in block B?
the medium black square  which is in block A the medium black square  which is in block B both of them none of them