Question

Find odd word Single seller,price maker,no close substitutes,advertising​

Answer 1

advertising because all are part of monopoly market except advertising

Answer 2

Advertising is the odd word out of the given words.

Explanation:

Single Seller, Price maker, no close substitutes all are features of a Monopoly market form.

Monopoly market occurs when there is just one seller in the market. Being a  single seller, having no close substitutes, gives the firm the authority to adjust price accordingly, hence it's called a price maker.  

Advertising on the other hand, is a feature of a competitive market, where there exists close substitutes and product differentiation plays a key role in being the market leader.