Given below a question followed by three statements. You have to study the question and the statements and decide which of the statement(s) is/are necessary to answer the question.
What is the principal sum?
I. The sum amounts to Rs 690 in 3 years at S.I.
II. The sum amounts to Rs 1150 in 5 years at S.I.
III. The rate of interest is 5% p.a.
AI and III only
BII and III only
CI and II only
DAny two of the three
I think it is not the D part as it does'nt make any sense