a) 2.5 years

b) 2 years

c) 1.5 years

d) 1 year

correct answer is: a) 2.5 years

**Explanation:**

Now here,

Principal = ₹ 5600

Amount = ₹ 6720

Rate = 8%

So that, S.I. =\left(amount\ -\ principle\right)

\rightarrow S.I. =₹\left(6720\;-\;5600\right)

\rightarrow S.I. = ₹ 1120

We know, time =\frac{100\times S I}{P\times R}

\therefore time =\frac{100\times1120}{5600\times8}

\rightarrow Time =2.5 years**Ans:** The time will 2.5 years.