The question given below is followed by two statements. You have to determine whether the data given in the statements are sufficient for answering the question. You should use the data and your knowledge of Mathematics to choose between the possible answer.
What is the rate of interest Percent per annum?
I. An amount doubles itself in 5 yr on simple interest.
II. Difference between the compound interest and the simple interest earned on a certain amount in two years is ₹ 400.
III. Simple interest earned per annum is ₹ 2000

Options

A. A)Only I
B. B)II and III
C. C)Any two of three
D. D)Either I alone or II and III together