Explanation:

- Cost price of the article is Rs. 450.

- Marked price is approximately 33.33% above the cost price:

- \( \text{Marked Price} = 450 + (33.33\% \times 450) = 450 + 150 = 600 \)

- Discount given is 5%:

- \( \text{Selling Price} = 600 - (5\% \times 600) = 600 - 30 = 570 \)

- To find the profit percentage:

- Profit = Selling Price - Cost Price = 570 - 450 = 120

- Profit Percentage = \( \left(\frac{120}{450}\right) \times 100 = 26.66\% \)

- Correct Answer: Option 4 - 26.6%