There are three blocks, A, B and C. Block B is to the right of blocks A and C. Block A has one medium black triangle. Block B has one small yellow square. And block C has two medium black circles. This block also contains a medium blue square. It also contains a small yellow circle. Above medium black circle number one is the small yellow circle. This shape is to the left of medium black circle number two which is below and to the right of the medium blue square. Medium black circle number one is below and to the right of the medium blue square.
What is below the medium square? a small yellow square or a medium black circle?
small yellow square  medium black circle  both of them none of them