The correct option is B Tranquilizer
An antimicrobial tends to destroy/prevent development or inhibit the pathogenic action of microbes such as bacteria, fungi, virus, or other parasites selectively. Antimicrobial are classified as :
1. Antiseptics are applied to the living tissues such as wounds, cuts,ulcers and diseased skin surfaces.
2. Disinfectants are applied to inanimate objects such as floors, drainage system, instruments, etc.
3. Antibiotics are used as drugs to treat infections because of their low toxicity for humans and animals.