The answer is A lemon juice has a acidic level and water is a base and tums make acidic things cool and you can just do process of elimination water isn't acidic its ph is 6-8 and tums is getting rid of acidic levels sorry for grammer in a rush
The characteristic best distinguishes glycolysis and the Krebs cycle from the electron transport chain is the amount of ATP produced . In glycolysis net ATp production is 2 ATP and in 1 Kreb's cycle 38 ATP are produced. Hence option A is correct.