In the question, three quantities I, II, and III are given. You have to solve all the quantities and establish the correct relation between them and choose the correct option accordingly.

Quantity I: The difference between compound interest and simple interest on a sum of Rs.10000 for 2 years is Rs. 25. Find the rate of interest?
Quantity II: The difference between compound interest and simple interest on a sum of Rs.32000 for 3 years is Rs. 992. Find the rate of interest?
Quantity III: If the ratio of difference between compound interest and simple interest for 3 years and 2 years is 31:10 respectively, then find the rate of Interest?