Vishwas borrowed a total amount of Rs. 30000, part of it on simple interest rate of 12 p.c.p.a. and remaining on simple interest rate of 10 p.c.p.a. If at the end of 2 year she paid in all Rs. 36840 to settle the loan amount, what was the amount borrowed at 12 p.c.p.a ?

• A. Rs. 12000
• B. Rs. 16000
• C. Rs. 17500
• D. Rs. 18000