A rectangle has 4 sides not the same length and 4 right angles.
It is a rectangle. Just picture it. 4 right angles and 2 sides that are the same length.
A shape with opposite sides parallel and of the same length and four right angles is a rectangle.
a polygon with 4 right angles and 4 sides of the same length
A square has 4 right angles and 4 equal sides.
The right answer is a rectangle.
Sides cannot be right angles whatever the figure because sides are sides and not angles, the answer you are looking for is a rhombus.