The rate of interest for the first 2 years is 6% p.a., for the next 3 years is 10% p.a. and for the period beyond 5 years is 12% p.a. If a person gets Rs. 12,771 as simple interest after 7 years, then how much money did he invest?

• A. Rs. 19,350
• B. Rs. 19,450
• C. Rs. 19,300
• D. Rs. 20,000