Explanation:

Let's break down the scenario:

- Original salaries are in the ratio 2:3:5.

- Let's assume their salaries are 2x, 3x, and 5x.

Now, calculate the increased salaries:

- Father's salary increases by 15%: $2x\times 1.15=2.3x$

- Mother's salary increases by 10%: $3x\times 1.10=3.3x$

- Daughter's salary increases by 20%: $5x\times 1.20=6x$

New salary ratio:

$$2.3x:3.3x:6x$$

On simplifying (by dividing all by 0.1x), the ratio becomes:

$$23:33:60$$

That's option 2.

- Option 1: Not applicable; the numbers don't match.

- Option 3: No correlation with calculated values.

- Option 4: Discrepancy from calculated outcome.

Your option 2, 23 : 33 : 60, is correct.

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