During which phase(s) of cell cycle, amount of DNA in a cell remains at 4C level if the initial amount is denoted as 2C?

A cell cycle is divided into G₁, S, G₂ and M phases. G₁ or first growth phase is followed by S phase or synthetic phase. DNA replication occurs in S phase and DNA amount doubles up i.e., a cell with 2C DNA in G₁ phase will now have 4C DNA. G₂ phase is second growth phase where DNA content remains 4C. M phase is the phase of division where DNA content either regains 2C level (mitosis) or becomes halved i.e. 1C (in meiosis). G₀ phase is the  phase of differentiation where cell contains.