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