SI on a certain sum of money for 3 yrs at 8 percent /annum is 1/2 the CI on Rs.4000 for 2 yrs at 10 percent/ annum. The sum placed on SI is?  Choose the correct choice from the following choices
A) Rs. 1600
B) Rs. 1650
C) Rs. 1750
D) Rs. 1800
E) Rs. 1900
C.I.   = Rs. 4000 x 1 +	10 2	- 4000   100   = Rs. 4000 x	11	x	11	- 4000   10	10   = Rs. 840.   Sum = Rs. 420 x 100 = Rs. 1750.   3 x 8   Rs. 1750
<result>C</result>
SI on a certain sum of money for 3 yrs at 8 percent /annum is 1/2 the CI on Rs.4000 for 2 yrs at 10 percent/ annum. The sum placed on SI is?