Explanation:

- Option 1, A: Buy 3 and get 4 free means you pay for 3 and receive a total of 7 items, effectively a 4/7 or about a 57.14% discount.

- Option 2, A does not give any discount: This is incorrect; scheme A offers a discount.

- Option 3, A and B both have the same discount percentage: This would be true if the discount percentages matched, but they do not.

- Option 4, B: Buy 5 and get 6 free means you pay for 5 and receive a total of 11 items, effectively a 6/11 or about a 54.55% discount.

Option 1, A offers the maximum discount of about 57.14%.