The correct option is A G1 → S → G2 → M
The cell cycle is divided into two basic phases known as interphase and M Phase (Mitosis phase). The interphase is further divided into three phases known as G1 phase (Gap 1), S phase (Synthesis) and G2 phase (Gap 2). Hence the sequence of phases of cell cycle is:
G1 → S → G2 → M