Fill in the blanks in each of the following, so as to make the statement true :

(i) A rectangle is a parallelogram in which ________.

(ii) A square is a rhombus in which __________.

(iii) A square is a rectangle in which ___________.

(i) A rectangle is a parallelogram in which opposite sides are parallel and equal.

(ii) A square is a rhombus in which all the sides are of equal length.

(iii) A square is a rectangle in which opposite sides are equal and parallel and each angle is a right angle.