In which of the following options, the molecules are correctly arranged in the increasing order of their bond angles?

• A

  $\mathrm{NH}_3 < \mathrm{O}_3 < \mathrm{H}_2 \mathrm{O} < \mathrm{SO}_2$
• B

  $\mathrm{H}_2 \mathrm{O} < \mathrm{O}_3 < \mathrm{NH}_3 < \mathrm{SO}_2$
• C

  $\mathrm{H}_2 \mathrm{O} < \mathrm{NH}_3 < \mathrm{SO}_2 < \mathrm{O}_3$
• Correct answer
  D

  $\mathrm{H}_2 \mathrm{O} < \mathrm{NH}_3 < \mathrm{O}_3 < \mathrm{SO}_2$

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