There are three blocks, A, B and C. Block A is below and B is above C. Block A contains a medium blue square. Below a medium black square there is the medium blue square. Block B contains a medium yellow square. Block C contains two medium black squares. Below medium black square number two is medium black square number one.
What is below the yellow shape? a medium black square number one or a medium black square that is in block A?
medium black square  number one medium black square  that is in block A both of them none of them