There are three blocks. We call them A, B and C. Block B is to the left of A and block A is to the right of C. Block A has two medium yellow squares and two other medium black squares. Below medium black square number one , medium yellow square number two and medium black square number two there is medium yellow square number one. Medium yellow square number two is below medium black square number one and medium black square number two. Block B contains a medium black square. And block C contains one medium black square and one medium yellow square. Below the medium yellow square is the medium black square.
Which object is to the left of a medium black square? the medium yellow square that is in block C or medium yellow square number two?
the medium yellow square  that is in block C medium yellow square  number two both of them none of them