There are three blocks. We call them A, B and C. Block A is below C and block C is to the left of B. Block A contains a medium yellow circle. Block B has a medium yellow square, one medium yellow triangle and one medium blue triangle. The medium yellow square is touching the right edge of this block. The medium blue triangle is touching the bottom edge of this block. Above the medium yellow triangle and the medium blue triangle is the medium yellow square. Block C contains a big black square.
Which object is to the right of a black square? the medium yellow triangle or the circle?
the medium yellow triangle  the circle  both of them none of them