There are three blocks, A, B and C. Block B is above A. Block A is below C. Block A has a small blue square. Block B has two big black squares. This block also has one small yellow triangle. There are also a medium black circle and a big yellow circle in this block. Below and to the left of big black square number one which is above the small yellow triangle and big black square number two is the medium black circle.. Big black square number one is touching the right edge of this block. Big black square number two is touching the right edge of this block. It is above the small yellow triangle. And block C has a small blue triangle and a big blue square. The small blue triangle is to the right of the big blue square.
What is above the small blue square? a medium black circle or a small yellow triangle?
medium black circle  small yellow triangle  both of them none of them