Two elements, $X$ and $Y$, have atomic numbers 33 and 17 respectively. The milecular formula of a stable compound formed between then is

• A

  $X Y$
• B

  $X Y_{2}$
• Correct answer
  C

  $X Y_{3}$
• D

  $X Y_{4}$

Hence, the correct answer is option: 'C'.