Which of the given statements is correct? Justify your answer/s with examples.
A ) A square and a parallelogram are quadrilaterals.
B ) Opposite sides of a square and a parallelogram are parallel.
C ) A trapezoid has one pair of parallel sides.
D ) All the above
Answer: D) A is correct as according to the shapes they both have four sides. B is correct as according to the shapes the opposite sides are parallel. C is correct as only the bottom side is parallel to the top. Thus, the answer is D.