Let F1 be the set of parallelograms, F2 the set of rectangles, F3 the set of rhombuses, F4 the set of squares and F5 the set of trapeziums in a plane. Then F1 may be equal to

(A) F2 ∩ F3 

(B) F3 ∩ F4

(C) F2 ∪ F5 

(D) F2 ∪ F3 ∪ F4 ∪ F1

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1 Answers

Answer is D

Every rectangle, rhombus, square in a plane is a parallelogram but every trapezium is not a parallelogram.

F1 = F2 ∪ F3 ∪ F4 ∪ F1

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