When anaerobic respiration occurs in muscle cells, it produces

carbon dioxide, water, and energy.

carbon dioxide, ethanol, and energy.

lactic acid and energy.

glucose, oxygen, and energy.

Technically the best answer would be: Lactic acid and energy

But what actually happens is pyruvate is reduced into lactate and NAD + is produced to feed back into glycolysis, which then keeps glycolysis going to produce more energy. So it is the best option because none of the others are correct