Breaks down pyruvic acid molecules into $C{O_2}$ molecules, ${H^ + }$ (protons), and 2 ATP molecules.

(C) Kreb’s Cycle

Explanation

The Kreb’s Cycle breaks down pyruvic acid molecules into $C{O_2}$ molecules, ${H^ + }$ (protons), and 2 ATP molecules and liberates two electrons as the second step of cellular respiration.

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