Compare the statements $A$ and $B$.
$Statement A$: Synthesis of $DNA$ takes place in the $S$-phase of interphase.
$Statement B$: Every chromosome,during metaphase,has two chromatids.
Choose the correct description.

• A
  Statement $A$ is wrong and $B$ is correct.
• B
  Statement $A$ is correct and $B$ is wrong.
• C
  Both the statements $A$ and $B$ are correct and $A$ is the reason for $B$.
• D
  Both the statements $A$ and $B$ are correct and $A$ is not the reason for $B$.