pyq/2020/csat/48

A bottle contains 20 litres of liquid A. 4 litres of liquid A is taken out of it and replace by same quantity of liquid B. Again 4 litres of the mixture is taken out and replaced by same quantity of liquid B. What is the ratio of quantity of liquid A to that of liquid B in the final mixture?

(A) 4: 1

(B) 5: 1

(C) 16: 9

(D) 17: 8