Explanation:

Here’s the thing: She spends 25% of her income, and that spending amounts to Rs1,250. So, let's break it down:

- 25% of her total income = Rs1,250

- To get the full income, divide Rs1,250 by 0.25 (that’s 25%):

Rs1,250 ÷ 0.25 = Rs5,000

Now, let’s look at the options:

- Option 1: Rs2,500 — That would mean she spends 50% of her income, which doesn’t match.

- Option 2: Rs5,000 — This checks out, since 25% of Rs5,000 is Rs1,250.

- Option 3: Rs1,250 — That would mean she spends 100% of her income, which is off.

- Option 4: Rs1,000 — 25% of Rs1,000 is just Rs250, so that's not it.

So the correct answer is Option 2: Rs5,000.