A sum of Rs 2500 is split into two parts, one part being lent at simple interest and the other part being lent at compound interest, interest being compounded annually. At the end of two years, the total amount of interest earned on the sum is Rs 201. Find the sum lent at simple interest, if both the part are lent at an interest rate of 4% per annum.
A. Rs 1250
B. Rs 1625
C. Rs 1875
D. Rs 1500