There are two blocks, A and B. Block A is to the right of B. Block A contains one medium blue square. Block B contains two medium black squares. Medium black square number one is below medium black square number two , a medium yellow square and a medium blue square. Medium black square number two is below the medium yellow square. The medium yellow square is below the medium blue square.
Which object is to the left of a medium blue square? medium black square number two or medium black square number one?
medium black square  number two medium black square  number one both of them none of them