Dear student,
Here is the answer to your asked queries:
a) A pair of opposite sides are parallel is Trapezium.
b) All sides are equal and angles are right angles is a square.
c) Two pair of opposite sides are parallel and equal is a Parallelogram.
d) All sides are equal and diagonals bisect perpendicularly is a Rhombus.
e) Two pairs of opposite sides are parallel and equal and each angle is a right angle is a Rectangle.
Regards