The income of A is 60% less than that of B, and the expenditure of A is equal to 60% of B’s expenditure. If A’s income is equal to 70% of B’s expenditure, then what is the ratio of the saving of A and B?

• A. 3 : 8
• B. 2 : 15
• C. 4 : 7
• D. 5 : 9