Which of the following is a parallelogram:- Choices:
A) 130,50,130,50(angle in deg)
B) 120,30,130,20(angle in deg)
C) 90,90,90,90(angle in deg)
D) a & c
E) none
sum of adjacent angles is 180 degrees.   so, a&amp;c   ANSWER:a &amp; c
<result>D</result>
Which of the following is a parallelogram:-