Which of the following are not used for the treatment of humans?

Antiseptics are chemical substances which prevent the growth of microorganisms or kill them and are safe to be applied to living tissues such as wounds, cuts, ulcers, and diseased skin surfaces.

Disinfectants are chemical substances which kill microorganisms but are not safe to be applied to living tissues. They are generally applied to inanimate objects such as floors, drainage systems, and instruments.

Antimalarials and antibiotics are drugs used for the treatment of diseases in humans.

Therefore, disinfectants are not used for the treatment of humans.

Answer: Disinfectants