Explanation:

- Total capital of Uranium Private Limited: Rs. 50 lacs.

- Debt amount: Rs. 20 lacs.

- Profit earned: Rs. 10 lacs.

- ROI calculation: ROI is calculated as (Profit / Total Capital) * 100.

- Here, (10 lacs / 50 lacs) * 100 = 20%.

- Option 1: 20% - This represents the correct calculation.

- Option 2: 40%

- Would imply a profit of Rs. 20 lacs on Rs. 50 lacs capital, which is incorrect for this scenario.

- Option 3: 10%

- Would imply a profit of Rs. 5 lacs on Rs. 50 lacs capital, which doesn't match the given data.

- Option 4: 80%

- Would imply a profit of Rs. 40 lacs on Rs. 50 lacs capital, clearly too high here.

Correct Answer: Option 1 - 20%