Which of the following is a water-borne disease?

Typhoid

The correct answer is option 1. Typhoid.

Typhoid fever is a bacterial infection caused by the bacterium Salmonella enterica serotype Typhi. The primary mode of transmission is through the consumption of contaminated food or water. Contaminated water sources, especially in areas with poor sanitation and inadequate water treatment, can harbor the bacteria. The symptoms of typhoid fever include high fever, abdominal pain, headache, and gastrointestinal issues. Proper sanitation, access to clean water, and vaccination are key measures for preventing the spread of typhoid.

Tuber (Assumed to refer to Tuberculosis, TB):**
Tuberculosis is primarily an airborne disease caused by the bacterium *Mycobacterium tuberculosis*. It is not typically considered a water-borne disease. Tuberculosis primarily spreads through the air when an infected person coughs or sneezes, releasing bacteria into the air. While waterborne transmission of tuberculosis is not a significant concern, the disease poses public health challenges, especially in overcrowded and poorly ventilated environments.

Therefore, the correct answer is Typhoid, which is known to be water-borne, while Tuberculosis (Tuber) is not transmitted through water.