End product of citric acid cycle is:

Explanation

The correct answer is CO2. The citric acid cycle, also known as the Krebs cycle, plays a crucial role in cellular respiration. During the cycle, acetyl-CoA undergoes oxidation, leading to the release of carbon dioxide (CO2) as a waste product. While CO2 is the direct product of this cycle, water (H2O) is primarily formed during the later stages of cellular respiration, specifically in the electron transport chain. Pyruvate is a precursor to the cycle, being converted into acetyl-CoA, while lactic acid is a product of anaerobic processes, not the citric acid cycle.