Final answer:
The skull and crossbones pictogram indicates fatal or toxic Acute Toxicity. Examples of substances that would carry this pictogram include cyanide.
Step-by-step explanation:
The skull and crossbones pictogram indicates fatal or toxic Acute Toxicity. It is used to warn about substances that can cause severe harm or death if they are inhaled, ingested, or come into contact with the skin.
An example of a substance that would carry this pictogram is cyanide. Cyanide is a highly toxic compound that can be fatal if ingested or inhaled in large amounts.
Therefore, the correct answer is a) Skull and Crossbones.