Which is not a property of a parallelogram?

a.) the diagonals bisect each other.
b.) contains four right angles.
c.) consecutive angles are supplementary.
d.) the opposite sides are parallel.

"Contains four right angles" is the one among the following choices given in the question that is not a property of a parallelogram. Parallelograms can have angles that are not ninety degrees. The correct option among all the options that are given in the question is the second option or option "B". 

Algebra or geometry?