Which of the following statements is not correct?

Group of answer choices

1) The deadweight loss that arises in monopoly stems from the fact that the profit-maximizing single-price monopoly firm produces a quantity of output that is smaller the socially-efficient quantity.

2) The deadweight loss caused by monopoly is similar to the deadweight loss caused by a tax on a product.

3) Consumer surplus is smaller with perfect price discrimination than for a single-price monopolist that can not price discriminaten with a single price monopoloblem caused by monopoly is monopoly profit.

4)For a given demand curve, the profit for a single-price monopolist is larger than for a monopolist that can price discriminate.