No. Every quadrilateral has 2 pairs of oposite sides. A paralelogram has two pairs of parallel sides. Cf wikipedia!
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Yes. A parallelogram is a quadrilateral in which both pairs of opposite sides are parallel.
Every quadrilateral has four sides and they are opposite each other. So, ALL quadrilaterals have both pairs of opposite sides.
Every quadrilateral has 2 pairs of opposite sides and so it is not clear what the question is about.
I would be seriously concerned if a quadrilateral had more than two pairs of opposite sides parallel! A quadrilateral with two pairs of opposite sides parallel is a parallelogram.
If both pairs of opposite sides are the same length, and both pairs of opposite angles are the same, the quadrilateral is a parallelogram (rhombus, rectangle, or square).