Which of the following element found in water is responsible for cancer?

Arsenic

The correct answer is Option (1) - Arsenic

Out of the choices you listed, the element that can be responsible for cancer if present at high levels is: Arsenic

Here's why:

• Arsenic: Chronic exposure to high levels of arsenic in drinking water has been linked to an increased risk of various cancers, including skin cancer, bladder cancer, and lung cancer.
• Iron: Iron is an essential element for the human body and isn't linked to cancer.
• Chlorine: Chlorine is commonly used for water disinfection and doesn't cause cancer at the levels typically found in treated drinking water.
• Fluorine: Fluoride, a compound containing fluorine, is added to many public water supplies to promote dental health.
• It's important to note that safe drinking water regulations limit the amount of arsenic allowed.