What is the respective ratio between Arun’s monthly income in the year 2006, Suman’s monthly income in the year 2007 and Jyoti’s monthly income in the year 2005?

Correct Answer: None of these
In year 2006 Arun's salary In year 2007 Suman's salary In year 2005 Jyoti's salary
18000 15000 9000
18 15 9
6 5 3