What is the rate percent when the simple interest on Rs.800 amount to Rs.144 in 4 Years? Select the correct option.
A) 5 %	B) 8 %	C) 3 %	D) 4.5 %	E) 1 %

Rationale: "144 = ( 800 * 4 * r ) / 100 r = 4.5 % answer : d"
Answer: D