Which of the following is a common disinfectant solution?

Chlorine is recognized as a common disinfectant solution due to its strong germicidal properties. It is widely used in various settings, particularly in healthcare, sanitation, and food service, to eliminate bacteria, viruses, and molds. Chlorine compounds, such as sodium hypochlorite, are effective against a broad spectrum of pathogens, making them ideal for disinfecting surfaces and instruments.

While other substances listed, such as alcohol, iodine, and hydrogen peroxide, also have disinfectant properties, chlorine is specifically noted for its widespread use and effectiveness in large-scale disinfection processes, such as treating drinking water and maintaining hygiene in community health settings.