In aqueous solution, which of the following behaves as strong acids or strong bases?
 HClO₃, H₂SO₃, NH₃, Br^—

• A. Strong acid: HClO₃
  Strong base: NH₃
• B. Strong acid: H₂SO₃
  Strong base: none
• C. Strong acid: HClO₃
  Strong base: none
• D. Strong acid: none
  Strong base: NH₃
• E. Strong acid: H₂SO₃
  Strong base: Br^—
• F. Strong acid: HClO₃
  Strong base: Br^—

Answer: (C)