Answer & Solution
Answer: Option C
Solution:
$$\eqalign{
& 2001 : \frac{\text{I}}{\text{E}} = \frac{1}{1} = \frac{4}{4} \cr
& 2002 : \frac{\text{I}}{\text{E}} = \frac{75}{100} = \frac{3}{4} \cr
& \text{Income} \% = \frac{4 - 3}{4} \times 100 = 25\% \cr}$$
