The compound ratio of 2:3, 3:4 and 4:5? Choose the correct choice from the following options:
A) 1:2  B) 2:5  C) 3:4  D) 3:5  E) 3:9
2/3 * 3/4 * 4/5 = 2/5
2:5
Answer: 2:5
<result>B</result>
The compound ratio of 2:3, 3:4 and 4:5?