Final answer:
Hydrogen Peroxide typically kills microbes by producing toxic free radicals.
Step-by-step explanation:
The correct answer is Hydrogen Peroxide (option b) as it typically kills microbes by producing toxic free radicals. Hydrogen peroxide is an effective disinfectant and antiseptic that works against a wide range of microorganisms including bacteria, fungi, viruses, and endospores. It degrades into water and oxygen gas, making it environmentally safe.