In which shape are opposite sides both parallel and equal?

The statement is correct because all the listed shapes—rectangle, square, and parallelogram—have the characteristic that opposite sides are both parallel and equal.

A rectangle has opposite sides that are equal in length, and each pair of opposite sides is parallel. This is a defining characteristic of rectangles.

A square possesses all the properties of a rectangle, with the additional feature that all four sides are equal in length. Thus, opposite sides in a square are not only parallel but also equal.

A parallelogram is defined as a quadrilateral with both pairs of opposite sides parallel. Furthermore, in a parallelogram, opposite sides are also equal in length.

Since each of the shapes fulfills the criteria of having opposite sides that are both parallel and equal, the correct answer encompasses all three shapes.