Answer:
The enzyme is b. Catalase
Step-by-step explanation:
Catalases are ubiquitous biological catalysts or enzymes, that speed up reaction rates. Here, they mediate hydrogen peroxide decomposition into water and oxygen. They are essential in organisms on Earth exposed to oxygen as they protect cells from oxidative damage.
2 H2O2 -----→ 2 H2O + O2
hydrogen peroxide water + oxygen
Reactive oxygen species, or free radicals are very reactive- they can cause damage to DNA molecules, RNA and proteins, leading to cell death.