The organism used for the industrial production of ethanol is:

The correct answer is Option (3) → Saccharomyces cerevisiae

Option (3) Saccharomyces cerevisiae — Correct. Yeast is used for commercial ethanol.

NCERT Extract:
Chemicals, Enzymes and Other Bioactive Molecules – “… Yeast (Saccharomyces cerevisiae) is used for commercial production of ethanol. Microbes are also used for production of enzymes. Lipases are used in detergent formulations and are helpful in removing oily stains from the laundry. You must have noticed that bottled fruit juices bought from the market are clearer as compared to those made at home.”