There is a parallelogram inside a circle such that all of its vertices lie on the circle. Which of the following can be true for the parallelogram in this case?
i) It can be a rhombus
ii) It can be a square
iii) It can be a rectangle
(iv) It can be a trapezium
ii,iii
Only squares and rectangles are the parallelograms that can be inscribed in a circle. Other parallelograms can not be inscribed in a circle. You can try to inscribe a parallelogram into a circle, you will always end up with a square or rectangle. Trapezium can also be inscribed in a circle but it is not a parallelogram. So, only ii and iii are true.