If an angle of a parallelogram is four-fifths of the adjacent angle, then the angles of the parallelogram are
80o, 100o, 80o, 100o
40o, 140o, 40o, 140o
60o, 120o, 60o, 120o
45o, 135o, 45o, 135o
In a parallelogram , one angle is 45th of its adjacent angle. Then the angles of the parallelogram are