What will be the difference between simple interest and compound interest @ 10% per annum on a sum of Rs. 1000 after 3 years? Choose the correct choice from the following:
A) 22 B) 77 C) 26 D) 19 E) 31

Rationale: "explanation : s . i . = rs . [ ( 1000 x 10 x 3 ) / 100 ] = rs . 300 c . i . = rs . [ 1000 x ( 1 + ( 10 / 100 ) ) 3 - 1000 ] = rs . 331 difference = rs . ( 331 - 300 ) = rs . 31 answer : e"
Answer: E