Which of the following sets shows species arranged in ascending order of their O–Cl–O bond angles?

• A. ClO₂^- < ClO₃^- < ClO₄^-
• B. ClO₃^- < ClO₂^- < ClO₄^-
• C. ClO₄^- < ClO₃^- < ClO₂^-
• D. ClO₄^- < ClO₂^- < ClO₃^-

Answer: (A)