Anaerobic Respiration in Humans Steps:

• Identify anaerobic respiration as energy production without oxygen, occurring in human muscles during intense activity.
• Recall that it starts with glycolysis, breaking glucose into pyruvate.
• In humans, pyruvate converts to lactic acid to regenerate NAD+ for continued glycolysis.
• The net equation simplifies to glucose yielding lactic acid, without CO2 release.

Why B is correct:

• The standard biochemical equation for human anaerobic respiration is C6H12O6 → 2 CH3CH(OH)COOH (lactic acid) + 2 ATP, matching option B directly.

Why the others are wrong:

• A describes alcoholic fermentation in yeast, not humans.
• C incorrectly adds carbon dioxide, which is not produced in human anaerobic respiration.
• D reverses the process and includes CO2 as a reactant, which is invalid.

Final answer: B