Q. The ratio of the incomes of A and B is 2 : 3 and that of their expenditure is 1 : 2. If 90% of B’s expenditure is equal to the income of A, then what is the ratio of the savings of A and B?

1. 8 : 7
2. 1 : 1
3. 9 : 8
4. 2 : 3