Rs. 800 at 5% per annum compounds interest amount to 882 in?

In compound interest,

Amount = Principal × ( 1 + \(\frac{R}{100}\) )n

882 = 800 × ( 1 + \(\frac{5}{100}\) )t

\(\frac{441}{400}\) =   ( \(\frac{21}{20}\) )t

( \(\frac{21}{20}\) )² =   ( \(\frac{21}{20}\) )t

So, t = 2

The correct answer is Option (4) → 2 years