Answer:
The correct answer is oxygen.
Step-by-step explanation:
The glowing splint bursts into flames during the decomposition of hydrogen peroxide, which shows that the production of oxygen is taking place, as the presence of oxygen enhances the combustion reaction of the splint substance. The more the concentration of oxygen, the more will be the glowing splint bursting into flames.
The glowing splint test refers to a basic qualitative test, which is generally used to assess oxidizing gases.