Which water treatment best reduces the risk of infection by killing pathogens in drinking water? (A) Chlorination (B) Filtration (C) Fluoridation (D) Precipitation - HSC - SSCE Biology - Question 1 - 2006 - Paper 1

The best water treatment method for reducing the risk of infection by killing pathogens in drinking water is Chlorination. Chlorination involves the addition of chlorine to water, which is highly effective at disinfecting water by killing various pathogens including bacteria, viruses, and parasites. While filtration can also remove some contaminants, it does not specifically target pathogens the way chlorination does.