Which of the following statement is false?
(a) If each pair of opposite sides of a quadrilateral is equal, then the quadrilateral is a parallelogram.
(b) If the sum of the consecutive interior angles of a quadrilateral is 90degree, then the quadrilateral is a parallelogram
(c) If the diagonals of a quadrilateral bisect each other, then it is a parallelogram
(d) Id in a quadrilateral, each pair of opposite angles is equal, and then it is a parallelogram.