DNA copies itself during which phase?

G1

G2

S

cytokinesis

Before this can happen, however, cells require a full complement of DNA for each of the new daughter cells that will form as a result of the split. Because of this, DNA makes a copy of itself in a process known as replication during interphase, a stage that occurs before cells divide.

so it would be G2

I was taught that it accura in G2.