Which of the following gives more number of oxides on reacting with HCl ?

• A

  $\mathrm{Na}_2 \mathrm{CO}_3$
• Correct answer
  B

  $\mathrm{NaNO}_2$
• C

  $\mathrm{Na}_2 \mathrm{SO}_3$
• D

  $\mathrm{NaHCO}_3$

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