Statement 1: A parallelogram is a trapezium.
Statement 2: A trapezium has one pair of opposite sides parallel. A parallelogram has both pairs of opposite sides parallel.
Both statements are true, statement 2 is the correct explanation of statement 1
A trapezium is defined as a quadrilateral whose one pair of opposite sides are parallel.
In a parallelogram, both pair of opposite sides are parallel. So, it satisfies the definition of a trapezium.