What is the rate percent when the simple interest on Rs.1600 amount to Rs.200 in 4 Years?	Options.
A) 4 %  B) 3.125 %  C) 5 %  D) 6 %  E) 7 %

Rationale: "interest for 1 year = 200 / 4 = 50 interest on rs 1600 p / a = 50 interest rate = 50 / 1600 * 100 = 3.125 % answer : b"
Answer: B