Subject: mathqa
Question: if a mixture is 5 ⁄ 9 alcohol by volume and 4 ⁄ 9 water by volume , what is the ratio of the volume of alcohol to the volume of water in this mixture ?
Option: 
A: 6 / 4
B: 5 / 4
C: 1 / 4
D: 7 / 4
Answer: B