In a given quadrilateral, each side is parallel to its opposite side and the diagonals are not perpendicular. What could it be?

check all that apply

A. Rectangle

B. Rhombus

C. Square

D. Parallelogram

The correct answer is : Sqaure and rhombus. In all the parallelograms, the diagonals bisect each other. But they bisect at 90 degrees only in square and rhombus. In rectangle and general parallelogram, the diagonals do not bisect at 90.