Answer: Comparative advertising
Explanation:
Comparative advertising is a strategy for promoting the sales of the product by the company by comparing their product with the product of other companies. Generally, the comparative advertising company generates the side by side comparative analysis of the products to attract the customers.
According to the given situation, in the advertisement the waiter indicates towards the bowl containing various antacid including the advertisement product that is Trice. But the patron explains the benefits of Trice to promote the product over other antacids. Thus the Trice advertisement is using the comparative advertising.