What happens to water when water is chlorinated? 

Germ-free

The correct answer is option 3. Germ-free.

When water is chlorinated, it becomes germ-free. Chlorination is a common water treatment method that involves the addition of chlorine or chlorine compounds to water to disinfect it and eliminate harmful microorganisms, including bacteria and viruses. Therefore, the correct option is: Germ-free .