The difference between simple and compound interest on Rs. 1700 for one year at 10% per annum reckoned half-yearly is?  Choose one:
A) 8.25
B) 4.25
C) 9.25
D) 3.25
E) 2.25

Rationale: "s . i . = ( 1700 * 10 * 1 ) / 100 = rs . 170 c . i . = [ 1700 * ( 1 + 5 / 100 ) 2 - 1700 ] = rs . 174.25 difference = ( 174.25 - 174 ) = rs . 4.25 . answer : b"
Answer: B