Arsenic and Cyanide are both forms of:

A.
Stimulants

B.
Poisons

C.
Depressants

B. Poisons

B. Poisons

The answer is B. Poisons.

To determine the correct answer, we can start by understanding the properties of arsenic and cyanide.

Arsenic is a chemical element that is highly toxic to humans and animals. It can be found naturally in the environment or in certain industrial and agricultural processes. Even small doses of arsenic can be lethal.

Cyanide, on the other hand, is a compound that contains a carbon atom and a nitrogen atom, in most cases. It is also highly toxic to humans and other living organisms. Cyanide works by inhibiting an enzyme called cytochrome c oxidase, which is responsible for cellular respiration, leading to cell death.

By considering the properties of both arsenic and cyanide, we can conclude that they are both forms of poisons. They are extremely harmful substances that can cause severe illness or even death when ingested or exposed to in high concentrations.

Therefore, the correct answer is B. Poisons.