There are three blocks, A, B and C. Block A has a medium black square and one medium blue square. Below the medium blue square there is the medium black square. Then, there is block B. It contains a medium blue square and a medium black square. Below the medium black square there is the medium blue square. Block C is to the right of block B and block A is below it. It contains a medium black square.
Which object is below a medium black square? the medium blue square that is in block B or the medium blue square that is in block A?
the medium blue square  that is in block B the medium blue square  that is in block A both of them none of them