What will be the difference between simple and compound interest @25% per annum on a sum of $3600 after 2 years?
Choose the correct choice:
A) $ 150 B) $ 220 C) $ 225 D) $ 182 E) $ 189

Rationale: "s . i . = 3600 * 25 * 2 / 100 = $ 1800 c . i . = 3600 * ( 1 + 25 / 100 ) ^ 2 - 3600 = $ 2025 difference = 2025 - 1800 = $ 225 answer is c"
Answer: C