What ions are formed during the autoionization of water?

• A. Hydronium (H3O+) and hydroxide (OH-) ions
• B. Ammonium (NH4+) and nitrate (NO3-) ions
• C. Sodium (Na+) and chloride (Cl-) ions
• D. Calcium (Ca2+) and carbonate (CO3 2-) ions

Answer: (A)