Nitin borrowed some money a the rate of 6% p.a. for the first three years, 9% p.a. for the next five years and 13% p.a. for the period beyond eight years. If the total interest paid by him at the end of eleven years is Rs 8160, how much money did he borrow?

• A. Rs 12000
• B. Rs 10000
• C. Data inadequate
• D. Rs 8000