Correct Answer - Option 4 : 1 year

**Given: **

Principal = Rs. 800

Rate of interest = 4% p.a.

Amount = Rs. 832

**Formula Used:**

Amount = Principal × (1 + rate of interest/100)^{T}^{ime}

**Calculation:**

(832/800)^{n} = (104/100)^{Time}

⇒ (26/25)^{1} = (26/25)^{Time}

⇒ Time = 1 year

∴ In 1 year Rs. 800 at 4% p.a. compounded annually will amount to Rs. 832.

The correct option is 4 i.e. 1 year

If a^{m} = a^{n}

Then m = n