The sequence of the four phases of the cell cycle is:

• A
  $G_{1} \rightarrow S \rightarrow G_{2} \rightarrow M$
• B
  $G_{1} \rightarrow G_{2} \rightarrow S \rightarrow M$
• C
  $S \rightarrow G_{1} \rightarrow G_{2} \rightarrow M$
• D
  $M \rightarrow G_{1} \rightarrow G_{2} \rightarrow S$