**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. 750 in 5 years at S.I.

III. The rate of interest is 5% p.a.

**Options are:**

A. I and III only

B. II and III only

C. I and II only

D. I and III only, or II and III only

E. Any two of the three

**Correct answer is:**

E. Any two of the three