Which Venn diagram is NOT correct?
A rhombus is a quadrilateral with 4 equal sides. Every square has 4 equal length sides, so every square is a rhombus.
A kite is a quadrilateral with 4 sides. So, every kite is a quadrilateral.
Some rectangles are not squares. This one is not, because it doesn't have 4 equal length sides.
A parallelogram is a quadrilateral with 2 pairs of parallel sides. The opposite sides on every square are parallel, so every square is a parallelogram.