(a) False.
In a square, all sides are equal, but in a rectangle, only opposite sides are equal.
Hence, the given statement is false.
(b) True.
Since, in a rhombus, opposite sides and angles are equal and diagonals bisect each other.
So, all rhombuses are parallelograms.
(c) True.
All properties of rhombuses and rectangles are also true for a square.
(d) False.
All squares have the same properties as that of a parallelogram.