Step 1: Identify the given values
Principal \( P = 25,600 \), Rate \( R = 6.25% \) per annum, Time \( T = 2 \) years.
Step 2: Apply the Compound Interest formula
The formula for compound interest is:
\[
A = P \left(1 + \frac{R}{100} \right)^T
\]
Substituting the values:
\[
A = 25600 \times \left(1 + \frac{6.25}{100} \right)^2
\]
\[
= 25600 \times \left(1.0625\right)^2
\]
\[
= 25600 \times 1.1289
\]
\[
= 28,900.64
\]
Step 3: Calculate the compound interest
Compound Interest \( C \) is given by:
\[
C = A - P = 28,900.64 - 25,600 = 3,300.64
\]
Thus, the correct answer is Rs. 3,300.