Which of the following bacteria infects the people working in the wool industry? 

Anthrax

The correct answer is option 2. Anthrax.

Anthrax is a bacterial infection caused by the bacterium Bacillus anthracis. While anthrax can affect various animals, including sheep and other livestock, it can also pose a risk to people who work in certain industries, including the wool industry. The spores of Bacillus anthracis can be present in soil and can contaminate animal products such as wool, hides, or hair.

In the context of the wool industry, workers who handle raw wool or come into contact with contaminated materials may be at risk of contracting anthrax. Inhalation anthrax is a form of the disease that can occur when spores are inhaled, often in occupational settings such as wool processing facilities.

It's important to note that anthrax is a rare disease, and preventive measures, such as proper hygiene, protective clothing, and vaccination of animals, can help reduce the risk of infection. Workers in industries where there may be a potential for anthrax exposure should follow safety guidelines and take appropriate precautions to minimize the risk of infection.