All but one is not a demerit of advertising?

The demerit of advertising that is not true is "Increase in profit." Advertising can lead to an increase in profit, but this is not a demerit, but rather a benefit of advertising. Advertising can have various demerits, such as: - It can lead to a monopoly, where large companies with huge advertising budgets can dominate the market and drive out smaller competitors. - It can encourage buyers to purchase products that they don't really need, leading to unnecessary consumption and waste. - Advertising can be expensive, which can lead to higher prices for products and services, ultimately borne by the consumers. - Advertising can be misleading, and make false claims about products or services, which can be harmful to consumers and erode trust in the marketplace. In summary, while advertising can certainly increase profits for businesses, it can also have negative consequences, such as the creation of monopolies, encouraging unnecessary consumption, and misleading consumers, which are all considered demerits of advertising.