Antonym of DISCOUNT

Answer: Option B

Discount : a deduction from the usual cost of something.
Interest : the feeling of wanting to know or learn about something or someone.
Premium : a sum added to an ordinary price or charge.
Profit : a financial gain, especially the difference between the amount earned and the amount spent in buying, operating, or producing something.
Concession : a thing that is granted, especially in response to demands.

Antonym of Discount is Premium