The correct answer is option 3: Antipyretics. Antipyretics are substances that are used to reduce or bring down the elevated body temperature during a high fever condition. They work by inhibiting the production of prostaglandins, which are chemicals in the body that cause fever. By reducing the production of prostaglandins, antipyretics help to lower the body temperature and provide relief from symptoms of fever. It is important to note that antiseptics (option 1) are substances used to kill or inhibit the growth of microorganisms on external surfaces of the body, while pyretics (option 2) are substances that induce fever. Antibiotics (option 4) are medications used to treat bacterial infections and are generally not used specifically to lower body temperature in fever conditions.