Answer:
No monopoly is not economically efficient
Explanation:
Monopolies are not economically efficient compared to perfect competition, because in perfect competition the firms will set a particular cost for a product that is accessible to all customers. The supply of the commodity will be less, and the cost will be higher if the market had only one supplier. The economic gains are higher in perfect competition because the total gains from the commodity are far less in monopoly compared to perfect competition.