Statement I:  Methyl orange is used as indicator in ${\mathrm{Na}}_2{\mathrm{CO}}_3$ titrating against HCI solution.

Statement II:  The pH range of methyl orange is 3.1 to 4.5.

• A

  Both statements I and II are correct.

• B

  Statement I is correct and statement II is incorrect.

• C

  Statement I is incorrect and statement II is correct.

• D

  Both statements I and II are incorrect.