How many litres of pure acid are there in 8 litres of a 20% solution  Choose the correct choice from the following
A) 1.5  B) 1.6  C) 1.7  D) 1.8  E) 1.9

Rationale: "explanation : question of this type looks a bit typical , but it is too simple , as below . . . it will be 8 * 20 / 100 = 1.6 answer : option b"
Answer: B