On a sum of money, the S.I. for 2 years is $600, while the C.I. is $609, the rate of interest being the same in both the cases. The rate of interest is?	Choose the correct choice:
A) 2%
B) 3%
C) 4%
D) 5%
E) 6%
Difference in C.I. and S.I for 2 years = $609 - $600 = $9   S.I for one year 609 -  600= 
<gadget id="calculator">609 -  600</gadget>
<output>9</output>
$9   S.I for one year= $300   S.I. on $300 for 1 year = $9   Rate = (100 * 9)/(300)= 
<gadget id="calculator">(100 * 9)/(300)</gadget>
<output>3</output>
3%   The answer is 3%.
<result>B</result>
On a sum of money, the S.I. for 2 years is $600, while the C.I. is $609, the rate of interest being the same in both the cases. The rate of interest is?