Assertion (A) : The area of trapezium with base 10 cm, height 5 cm and the side parallel to the given base being 6 cm is 40 cm2. Reason (R) : The area of trapezium =1/2 x (sum of non parallel sides) x height. 1. Both A and R are correct, and R is the correct explanation for A. 2. Both A and R are incorrect. 3. A is true, but R is false. 4. A is false, but R is true.