What is the rate percent when the simple interest on Rs.800 amount to Rs.200 in 4 Years?	Answers.
A) 5 %  B) 7 %  C) 6.25 %  D) 2 %  E) 4 %

Rationale: "200 = ( 800 * 4 * r ) / 100 r = 6.25 % answer : c"
Answer: C