A person is guilty of assault in the first degree when:

1. With intent to cause serious physical injury to another person, he causes such injury to such person or to a third person by means of a deadly weapon or a dangerous instrument; or

2. With intent to disfigure another person seriously and permanently, or to destroy, amputate or disable permanently a member or organ of his body, he causes such injury to such person or to a third person; or

3. Under circumstances evincing a depraved indifference to human life, he recklessly engages in conduct which creates a grave risk of death to another person, and thereby causes serious physical injury to another person; or

4. In the course of and in furtherance of the commission or attempted commission of a felony or of immediate flight therefrom, he, or another participant if there be any, causes serious physical injury to a person other than one of the participants.

Assault in the first degree is a class B felony.