If A = {Quadrilaterals} and B = {Rectangles} then the set A and set B are disjoint sets.
False
A ={Quadrilaterals}
⇒A={Trapeziums,Parallelograms,Rhombuses,Rectangles,Squares,Kites}
B = {Rectangles}
⇒B={Rectangles}
⇒A∩B={Rectangles}
∴ They are not disjoint sets.
Statment is false