Study the bar-graph carefully and answer the following question.
Bar graph shows the income tax (in thousand Rs.) paid by two person A and B in the period of 2011 to 2015.
What is the ratio of income of A in 2012 to income of B in 2015 if tax rate in 2012 and 2015 was 15% and 16% respectively?
1
2 ∶ 3
2
4 ∶ 5
3
3 ∶ 4
4
6 ∶ 7