Which yeast is used for commercial production of ethanol?

Correct answer: (b) Saccharomyces cerevisiae

Explanation

Saccharomyces cerevisiae (brewer's/baker's yeast) is used for commercial ethanol production.

It ferments sugars into ethyl alcohol and carbon dioxide via glycolysis, tolerating a wide pH range that limits infection.

Candida species and Leucosporidium are not the standard industrial fermenters.