Sonika deposited Rs.13000 which amounted to Rs.10200 after 4 years at simple interest. Had the interest been 5% more. She would get how much?  Choose the correct choice from the following answers
A) 18990
B) 13002
C) 12800
D) 12300
E) 14500

Rationale: "( 13000 * 4 * 5 ) / 100 = 2600 10200 - - - - - - - - 12800 answer : c"
Answer: C