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