Final answer:
The group of nonmetallic elements with antimicrobial applications like bromine, iodine, chlorine, and fluorine, are called halogens, belonging to Group 17 on the periodic table.
Step-by-step explanation:
The group of nonmetallic elements with antimicrobial application, including bromine, iodine, chlorine, and fluorine, are known as halogens. These elements belong to Group 17 of the periodic table and are recognized for their high reactivity, particularly their ability to readily react with metals to form salt compounds such as sodium chloride and calcium chloride. Chlorine is found in a gaseous state, bromine as a liquid, and iodine as a solid at room temperature. This property, along with their antimicrobial application, is a distinguishing characteristic of the halogens.
The correct answer to the question is, therefore, b) Halogens.