Indicate the products $(X)$ and $(Y)$ in the following reactions:
$Na_{2}S + nS (n=1-8) \rightarrow (X)$
$Na_{2}SO_{3} + S \rightarrow (Y)$

• A
  $Na_{2}S_{2}O_{3} \quad Na_{2}S_{2}$
• B
  $Na_{2}S_{(n+1)} \quad Na_{2}S_{2}O_{3}$
• C
  $Na_{2}S_{n} \quad Na_{2}S_{2}O_{3}$
• D
  $Na_{2}S_{5} \quad Na_{2}S_{2}O_{4}$