Among the following spontaneous cell reactions,
Y⁺ + W → Y + W⁺W⁺ + Z → W + Z⁺
Y⁺ + Z → Y + Z⁺
X⁺ + Z → X + Z⁺Y⁺ + X → Y + X⁺
Identify the reaction that produces the highest voltage.

• A. Y⁺ + W → Y + W⁺
• B. W⁺ + Z → W + Z⁺
• C. Y⁺ + Z → Y + Z⁺
• D. X⁺ + Z → X + Z⁺
• E. Y⁺ + X → Y + X⁺

Answer: (C)