The rate of interest on a sum for the first 3 years is 8% p. a., for the next 4 years it is 10% p. a., and for the period beyond 7 years it is 16% p. a. If a person gets Rs. 11,340 simple interest after 10 years, how much money did he invest?

• A. Rs. 11,150
• B. Rs. 12,140
• C. Rs. 10,140
• D. Rs. 10,125