Identify the correct statement.
a. The maximum concentration of alcohol in naturally fermented beverages is up to 13%
b. The net gain of ATP in both alcohol and lactic acid fermentation is 2.
c. ${\mathrm{CO}}_2$is released during alcohol fermentation but not in lactic acid fermentation.

detailed solution

Correct option is D

The maximum concentration of alcohol in naturally fermented beverages is up to 13%. This is because yeasts poison themselves to death at an alcohol concentration of 13%.The net gain of ATP in both the types of fermentation is 2 ATP.  The NADH produced during glycolysis is again oxidized to NAD+ during fermentation.CO2 is released only during alcoholic fermentation. Here pyruvic acid, a 3-carbon compound is converted to 2 carbon compound ethyl alcohol and CO2 is released.