Correct Option: B

Pasteur effect : While the oxygen concentration is low, the product of glycolysis, (pyruvate), is turned into ethanol and carbon dioxide, and the energy production efficiency is low (2 moles of ATP per mole of glucose). If the oxygen concentration grows, pyruvate is converted to acetyl CoA that can be used in the citric acid cycle, which increases the efficiency to 36 moles of ATP per mole of glucose. Therefore, about 15 times as much glucose must be consumed anaerobically as aerobically to yield the same amount of ATP. Thus it is heat treatment for bacteria.