Give the balanced chemical reaction when carbon monoxide undergoes photoionization.

• A. CO(g) + e^– → CO⁺(g)
• B. CO(g) + e^– → CO^–(g)
• C. CO(g) → CO⁺(g) + e^–
• D. CO(g) → CO^–(g) + e^–

Answer: (C)