As per Occupational Safety and Health Administration (OSHA), the hazard communication pictogram of flame over a circle represents the hazardous waste to be a:

Correct option is A

Explanation:
The hazard communication pictogram of a flame over a circle is used to indicate oxidizing substances under the Globally Harmonized System of Classification and Labelling of Chemicals (GHS), adopted by OSHA.
Oxidizers are substances that can cause or intensify a fire by providing oxygen to fuels, even in the absence of external air. These substances do not burn themselves but facilitate combustion, making them dangerous in storage and handling.
The OSHA Hazard Communication Standard (HCS) aligns with GHS and classifies oxidizing materials under physical hazards, requiring them to be labeled with the flame over circle pictogram.
· Hydrogen Peroxide (H₂O₂)
· Potassium Nitrate (KNO₃)
· Sodium Chlorate (NaClO₃)
· Perchlorates (e.g., Ammonium Perchlorate, NH₄ClO₄)
Information Booster:
· OSHA Hazard Pictograms under GHS:
1. Flame – Flammable materials.
2. Flame Over Circle – Oxidizers.
3. Exploding Bomb – Explosives, self-reactive substances.
4. Gas Cylinder – Gases under pressure.
5. Corrosion – Corrosive materials.
6. Skull and Crossbones – Acute toxicity.
7. Exclamation Mark (– Irritants, skin sensitizers.
8. Health Hazard – Carcinogens, reproductive toxicity.
9. Environment – Hazardous to aquatic life.
Additional Information:
· Why are oxidizers hazardous?
· They release oxygen, making combustible materials burn more intensely.
· Can cause spontaneous combustion if stored improperly.
· Used in industrial processes, rocket fuels, and bleaching agents.
· How to handle oxidizers safely?
· Store them away from flammable materials.
· Keep in well-ventilated areas.
· Use non-combustible containers for storage.