Correct Answer - Option 2 : 2.5 Years

**Given:**

I = P/ 4

R = 10%

**Formula used:**

I = P × R × N/ 100

Where, P = Principal amount, R = Rate of interest, N = number of years and I = Simple interest

**Calculation:**

I = P/ 4

⇒ P/ 4 = P × 10 × N/ 100

⇒ 100/ (10 × 4) = N

⇒ N = 2.5 years

**∴ N is 2.5 years**