Explanation:

- To find the present value, we use the formula for compound interest:

$$

P = \frac{F}{(1 + r)^n}

$$

where \(P\) = present value, \(F\) = future value, \(r\) = interest rate, and \(n\) = number of years.

- Here, \(F = 8,640\), \(r = 20\%\) or 0.20, and \(n = 3\) years.

- Substituting the values,

$$

P = \frac{8,640}{(1 + 0.20)^3} = \frac{8,640}{1.728} \approx 5,000

$$

- Option 2: Rs5,000: Correct calculation.

- This is the amount you need to invest today to get Rs8,640 in three years.

- :white_check_mark: Correct Answer

- Option 1: Rs4,500: Incorrect as it’s lower than the calculated amount.

- Option 3: Rs6,000: Incorrect as it’s higher than needed.

- Option 4: Rs5,500: Incorrect as it’s more than calculated.