The alcohol and water in a mixture are in the ratio of 4 : 5 respectively. 20 litre water is added to it. If the ratio of alcohol and water in the new mixture is 1 : 3 respectively, then what is the total quantity of the alcohol in the new mixture?

A

$$\frac{80}{7}$$ litres

B

15 litres

C

$$\frac{60}{7}$$ litres

D

$$\frac{90}{11}$$ litres