A sample of water contains $\mathrm{Mg}\left(\mathrm{HCO}_3\right)_2$ and $\mathrm{Ca}\left(\mathrm{HCO}_3\right)_2$. On boiling this water, these hydrogen carbonates are removed as precipitates. The precipitates are

• A

  $\mathrm{MgCO}_3, \mathrm{CaCO}_3$
• B

  $\mathrm{Mg}(\mathrm{OH})_2, \mathrm{Ca}(\mathrm{OH})_2$
• Correct answer
  C

  $\mathrm{Mg}(\mathrm{OH})_2, \mathrm{CaCO}_3$
• D

  $\mathrm{MgCO}_3, \mathrm{Ca}(\mathrm{OH})_2$

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