How many litres of pure acid are there in 8 litres of a 20% solution?
Select the correct option
A) 2 litres  B) 1.4 litres  C) 1 litres  D) 1.6 litres  E) none of these

Rationale: "explanation : quantity of pure acid = 8 × ( 20 / 100 ) = 1.6 answer : option d"
Answer: D