As per WHO (World Health Organization), which of the following is NOT an example of disinfection by-products formed at traditional drinking water treatment plants?

Titania

The correct answer is Option (1) - Titania

As per the World Health Organization (WHO), Titania is not an example of disinfection by-products formed at traditional drinking water treatment plants. However, Bromate, Chlorate, and Chlorite are examples of disinfection by-products.