1.

Let F_(1) be the set of parallelograms, F_(2) the set of rectangles, F_(3) the set of rhombuses, F_(4) the set of squares and F_(5) the set of trapeziums in a plane. Then, F_(1) may be equal to

Answer»

`F_(2) cap F_(3)`
`F_(3) cap F_(4)`
`F_(2) cup F_(5)`
`F_(1) cup F_(2) cup F_(3) cup F_(4)`

Answer :D


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