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